Finding the Fourth Proportional to 89,423.50, 133,931.13 and 42,709.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89,423.50 : 133,931.13 = 42,709.18 : x
2. Step 2: Convert to fraction form
   89,423.50/133,931.13 = 42,709.18/x
3. Step 3: Cross multiply
   89,423.50x = 133,931.13 × 42,709.18
4. Step 4: Simplify right side
   89,423.50x = 5,720,088,738.77
5. Step 5: Solve for x
   x = 5,720,088,738.77/89,423.50
6. Step 6: Final answer
   x = 63,966.28