Finding the Fourth Proportional to 57,401.29, 86,020.16 and 42,289.56

Step by Step Solution

1. Step 1: Write the proportion equation
   57,401.29 : 86,020.16 = 42,289.56 : x
2. Step 2: Convert to fraction form
   57,401.29/86,020.16 = 42,289.56/x
3. Step 3: Cross multiply
   57,401.29x = 86,020.16 × 42,289.56
4. Step 4: Simplify right side
   57,401.29x = 3,637,755,106.86
5. Step 5: Solve for x
   x = 3,637,755,106.86/57,401.29
6. Step 6: Final answer
   x = 63,374.10