Finding the Fourth Proportional to 31,688.55, 47,530.35 and 8,314.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,688.55 : 47,530.35 = 8,314.38 : x
2. Step 2: Convert to fraction form
   31,688.55/47,530.35 = 8,314.38/x
3. Step 3: Cross multiply
   31,688.55x = 47,530.35 × 8,314.38
4. Step 4: Simplify right side
   31,688.55x = 395,185,391.43
5. Step 5: Solve for x
   x = 395,185,391.43/31,688.55
6. Step 6: Final answer
   x = 12,470.92