Finding the Fourth Proportional to 390,252,275.57, 585,144,573.89 and 124,243,025.96

Step by Step Solution

1. Step 1: Write the proportion equation
   390,252,275.57 : 585,144,573.89 = 124,243,025.96 : x
2. Step 2: Convert to fraction form
   390,252,275.57/585,144,573.89 = 124,243,025.96/x
3. Step 3: Cross multiply
   390,252,275.57x = 585,144,573.89 × 124,243,025.96
4. Step 4: Simplify right side
   390,252,275.57x = 72,700,132,485,010,064
5. Step 5: Solve for x
   x = 72,700,132,485,010,064/390,252,275.57
6. Step 6: Final answer
   x = 186,290,092.42