Finding the Fourth Proportional to 89,612.34, 123,613.47 and 56,020.02

Step by Step Solution

1. Step 1: Write the proportion equation
   89,612.34 : 123,613.47 = 56,020.02 : x
2. Step 2: Convert to fraction form
   89,612.34/123,613.47 = 56,020.02/x
3. Step 3: Cross multiply
   89,612.34x = 123,613.47 × 56,020.02
4. Step 4: Simplify right side
   89,612.34x = 6,924,829,061.67
5. Step 5: Solve for x
   x = 6,924,829,061.67/89,612.34
6. Step 6: Final answer
   x = 77,275.40