Finding the Fourth Proportional to 31,664.79, 47,499.93 and 8,291.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,664.79 : 47,499.93 = 8,291.25 : x
2. Step 2: Convert to fraction form
   31,664.79/47,499.93 = 8,291.25/x
3. Step 3: Cross multiply
   31,664.79x = 47,499.93 × 8,291.25
4. Step 4: Simplify right side
   31,664.79x = 393,833,794.61
5. Step 5: Solve for x
   x = 393,833,794.61/31,664.79
6. Step 6: Final answer
   x = 12,437.59