Finding the Fourth Proportional to 31,758.08, 47,641.98 and 8,386.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,758.08 : 47,641.98 = 8,386.34 : x
2. Step 2: Convert to fraction form
   31,758.08/47,641.98 = 8,386.34/x
3. Step 3: Cross multiply
   31,758.08x = 47,641.98 × 8,386.34
4. Step 4: Simplify right side
   31,758.08x = 399,541,842.55
5. Step 5: Solve for x
   x = 399,541,842.55/31,758.08
6. Step 6: Final answer
   x = 12,580.79