Finding the Fourth Proportional to 12,700.35, 17,517.74 and 8,931.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.35 : 17,517.74 = 8,931.42 : x
2. Step 2: Convert to fraction form
   12,700.35/17,517.74 = 8,931.42/x
3. Step 3: Cross multiply
   12,700.35x = 17,517.74 × 8,931.42
4. Step 4: Simplify right side
   12,700.35x = 156,458,248.73
5. Step 5: Solve for x
   x = 156,458,248.73/12,700.35
6. Step 6: Final answer
   x = 12,319.21