Finding the Fourth Proportional to 2,138,321.90, 3,207,961.55 and 718,339.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138,321.90 : 3,207,961.55 = 718,339.25 : x
2. Step 2: Convert to fraction form
   2,138,321.90/3,207,961.55 = 718,339.25/x
3. Step 3: Cross multiply
   2,138,321.90x = 3,207,961.55 × 718,339.25
4. Step 4: Simplify right side
   2,138,321.90x = 2,304,404,679,611.88
5. Step 5: Solve for x
   x = 2,304,404,679,611.88/2,138,321.90
6. Step 6: Final answer
   x = 1,077,669.68