Finding the Fourth Proportional to 31,656.60, 47,478.42 and 10,881.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,656.60 : 47,478.42 = 10,881.72 : x
2. Step 2: Convert to fraction form
   31,656.60/47,478.42 = 10,881.72/x
3. Step 3: Cross multiply
   31,656.60x = 47,478.42 × 10,881.72
4. Step 4: Simplify right side
   31,656.60x = 516,646,872.48
5. Step 5: Solve for x
   x = 516,646,872.48/31,656.60
6. Step 6: Final answer
   x = 16,320.35