Finding the Fourth Proportional to 89,240.64, 133,773.92 and 42,480.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,240.64 : 133,773.92 = 42,480.96 : x
2. Step 2: Convert to fraction form
   89,240.64/133,773.92 = 42,480.96/x
3. Step 3: Cross multiply
   89,240.64x = 133,773.92 × 42,480.96
4. Step 4: Simplify right side
   89,240.64x = 5,682,844,544.56
5. Step 5: Solve for x
   x = 5,682,844,544.56/89,240.64
6. Step 6: Final answer
   x = 63,680.01