Finding the Fourth Proportional to 31,798.86, 47,700.18 and 8,425.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,798.86 : 47,700.18 = 8,425.22 : x
2. Step 2: Convert to fraction form
   31,798.86/47,700.18 = 8,425.22/x
3. Step 3: Cross multiply
   31,798.86x = 47,700.18 × 8,425.22
4. Step 4: Simplify right side
   31,798.86x = 401,884,510.54
5. Step 5: Solve for x
   x = 401,884,510.54/31,798.86
6. Step 6: Final answer
   x = 12,638.33