Finding the Fourth Proportional to 31,625.32, 47,421.86 and 10,557.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,625.32 : 47,421.86 = 10,557.79 : x
2. Step 2: Convert to fraction form
   31,625.32/47,421.86 = 10,557.79/x
3. Step 3: Cross multiply
   31,625.32x = 47,421.86 × 10,557.79
4. Step 4: Simplify right side
   31,625.32x = 500,670,223.78
5. Step 5: Solve for x
   x = 500,670,223.78/31,625.32
6. Step 6: Final answer
   x = 15,831.31