Finding the Fourth Proportional to 31,632.86, 47,449.25 and 12,921.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,632.86 : 47,449.25 = 12,921.69 : x
2. Step 2: Convert to fraction form
   31,632.86/47,449.25 = 12,921.69/x
3. Step 3: Cross multiply
   31,632.86x = 47,449.25 × 12,921.69
4. Step 4: Simplify right side
   31,632.86x = 613,124,434.62
5. Step 5: Solve for x
   x = 613,124,434.62/31,632.86
6. Step 6: Final answer
   x = 19,382.52