Finding the Fourth Proportional to 280,500.55, 387,123.98 and 157,996.96

Step by Step Solution

1. Step 1: Write the proportion equation
   280,500.55 : 387,123.98 = 157,996.96 : x
2. Step 2: Convert to fraction form
   280,500.55/387,123.98 = 157,996.96/x
3. Step 3: Cross multiply
   280,500.55x = 387,123.98 × 157,996.96
4. Step 4: Simplify right side
   280,500.55x = 61,164,411,410.28
5. Step 5: Solve for x
   x = 61,164,411,410.28/280,500.55
6. Step 6: Final answer
   x = 218,054.52