Finding the Fourth Proportional to 31,393.85, 47,061.50 and 10,602.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,393.85 : 47,061.50 = 10,602.81 : x
2. Step 2: Convert to fraction form
   31,393.85/47,061.50 = 10,602.81/x
3. Step 3: Cross multiply
   31,393.85x = 47,061.50 × 10,602.81
4. Step 4: Simplify right side
   31,393.85x = 498,984,089.80
5. Step 5: Solve for x
   x = 498,984,089.80/31,393.85
6. Step 6: Final answer
   x = 15,894.33