Finding the Fourth Proportional to 89,914.80, 134,829.16 and 42,490.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,914.80 : 134,829.16 = 42,490.31 : x
2. Step 2: Convert to fraction form
   89,914.80/134,829.16 = 42,490.31/x
3. Step 3: Cross multiply
   89,914.80x = 134,829.16 × 42,490.31
4. Step 4: Simplify right side
   89,914.80x = 5,728,932,468.37
5. Step 5: Solve for x
   x = 5,728,932,468.37/89,914.80
6. Step 6: Final answer
   x = 63,715.13