Finding the Fourth Proportional to 393,198,300.83, 542,626,687.98 and 214,591,969.02

Step by Step Solution

1. Step 1: Write the proportion equation
   393,198,300.83 : 542,626,687.98 = 214,591,969.02 : x
2. Step 2: Convert to fraction form
   393,198,300.83/542,626,687.98 = 214,591,969.02/x
3. Step 3: Cross multiply
   393,198,300.83x = 542,626,687.98 × 214,591,969.02
4. Step 4: Simplify right side
   393,198,300.83x = 116,443,329,418,464,224
5. Step 5: Solve for x
   x = 116,443,329,418,464,224/393,198,300.83
6. Step 6: Final answer
   x = 296,144,030.05