Finding the Fourth Proportional to 89,157.40, 133,675.50 and 42,415

Step by Step Solution

1. Step 1: Write the proportion equation
   89,157.40 : 133,675.50 = 42,415 : x
2. Step 2: Convert to fraction form
   89,157.40/133,675.50 = 42,415/x
3. Step 3: Cross multiply
   89,157.40x = 133,675.50 × 42,415
4. Step 4: Simplify right side
   89,157.40x = 5,669,846,332.50
5. Step 5: Solve for x
   x = 5,669,846,332.50/89,157.40
6. Step 6: Final answer
   x = 63,593.67