Finding the Fourth Proportional to 31,826.52, 47,736.12 and 8,454.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,826.52 : 47,736.12 = 8,454.78 : x
2. Step 2: Convert to fraction form
   31,826.52/47,736.12 = 8,454.78/x
3. Step 3: Cross multiply
   31,826.52x = 47,736.12 × 8,454.78
4. Step 4: Simplify right side
   31,826.52x = 403,598,392.65
5. Step 5: Solve for x
   x = 403,598,392.65/31,826.52
6. Step 6: Final answer
   x = 12,681.20