Finding the Fourth Proportional to 12,686.34, 17,508.96 and 7,382.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686.34 : 17,508.96 = 7,382.86 : x
2. Step 2: Convert to fraction form
   12,686.34/17,508.96 = 7,382.86/x
3. Step 3: Cross multiply
   12,686.34x = 17,508.96 × 7,382.86
4. Step 4: Simplify right side
   12,686.34x = 129,266,255.14
5. Step 5: Solve for x
   x = 129,266,255.14/12,686.34
6. Step 6: Final answer
   x = 10,189.41