Finding the Fourth Proportional to 12,820.72, 17,693.27 and 7,517.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.72 : 17,693.27 = 7,517.25 : x
2. Step 2: Convert to fraction form
   12,820.72/17,693.27 = 7,517.25/x
3. Step 3: Cross multiply
   12,820.72x = 17,693.27 × 7,517.25
4. Step 4: Simplify right side
   12,820.72x = 133,004,733.91
5. Step 5: Solve for x
   x = 133,004,733.91/12,820.72
6. Step 6: Final answer
   x = 10,374.20