Finding the Fourth Proportional to 12,686.52, 17,511.12 and 7,383.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686.52 : 17,511.12 = 7,383.48 : x
2. Step 2: Convert to fraction form
   12,686.52/17,511.12 = 7,383.48/x
3. Step 3: Cross multiply
   12,686.52x = 17,511.12 × 7,383.48
4. Step 4: Simplify right side
   12,686.52x = 129,293,004.30
5. Step 5: Solve for x
   x = 129,293,004.30/12,686.52
6. Step 6: Final answer
   x = 10,191.37