Finding the Fourth Proportional to 31,499.91, 47,252.34 and 10,439.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,499.91 : 47,252.34 = 10,439.10 : x
2. Step 2: Convert to fraction form
   31,499.91/47,252.34 = 10,439.10/x
3. Step 3: Cross multiply
   31,499.91x = 47,252.34 × 10,439.10
4. Step 4: Simplify right side
   31,499.91x = 493,271,902.49
5. Step 5: Solve for x
   x = 493,271,902.49/31,499.91
6. Step 6: Final answer
   x = 15,659.47