Finding the Fourth Proportional to 31,434.96, 47,123.15 and 21,578.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,434.96 : 47,123.15 = 21,578.88 : x
2. Step 2: Convert to fraction form
   31,434.96/47,123.15 = 21,578.88/x
3. Step 3: Cross multiply
   31,434.96x = 47,123.15 × 21,578.88
4. Step 4: Simplify right side
   31,434.96x = 1,016,864,691.18
5. Step 5: Solve for x
   x = 1,016,864,691.18/31,434.96
6. Step 6: Final answer
   x = 32,348.21