Finding the Fourth Proportional to 288,861,718.82, 398,629,171.98 and 165,105,053.18

Step by Step Solution

1. Step 1: Write the proportion equation
   288,861,718.82 : 398,629,171.98 = 165,105,053.18 : x
2. Step 2: Convert to fraction form
   288,861,718.82/398,629,171.98 = 165,105,053.18/x
3. Step 3: Cross multiply
   288,861,718.82x = 398,629,171.98 × 165,105,053.18
4. Step 4: Simplify right side
   288,861,718.82x = 65,815,690,638,857,272
5. Step 5: Solve for x
   x = 65,815,690,638,857,272/288,861,718.82
6. Step 6: Final answer
   x = 227,844,973.39