Finding the Fourth Proportional to 2,138,641,643,514, 3,209,281,961,568.30 and 991,059,967,316.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138,641,643,514 : 3,209,281,961,568.30 = 991,059,967,316.43 : x
2. Step 2: Convert to fraction form
   2,138,641,643,514/3,209,281,961,568.30 = 991,059,967,316.43/x
3. Step 3: Cross multiply
   2,138,641,643,514x = 3,209,281,961,568.30 × 991,059,967,316.43
4. Step 4: Simplify right side
   2,138,641,643,514x = 3,180,590,875,941,087,892,996,096
5. Step 5: Solve for x
   x = 3,180,590,875,941,087,892,996,096/2,138,641,643,514
6. Step 6: Final answer
   x = 1,487,201,413,844.66