Finding the Fourth Proportional to 12,807.92, 17,676.32 and 7,507.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.92 : 17,676.32 = 7,507.20 : x
2. Step 2: Convert to fraction form
   12,807.92/17,676.32 = 7,507.20/x
3. Step 3: Cross multiply
   12,807.92x = 17,676.32 × 7,507.20
4. Step 4: Simplify right side
   12,807.92x = 132,699,669.50
5. Step 5: Solve for x
   x = 132,699,669.50/12,807.92
6. Step 6: Final answer
   x = 10,360.75