Finding the Fourth Proportional to 12,686.27, 17,502.75 and 7,376.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686.27 : 17,502.75 = 7,376.72 : x
2. Step 2: Convert to fraction form
   12,686.27/17,502.75 = 7,376.72/x
3. Step 3: Cross multiply
   12,686.27x = 17,502.75 × 7,376.72
4. Step 4: Simplify right side
   12,686.27x = 129,112,885.98
5. Step 5: Solve for x
   x = 129,112,885.98/12,686.27
6. Step 6: Final answer
   x = 10,177.37