Finding the Fourth Proportional to 12,402.72, 17,116.02 and 7,625.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.72 : 17,116.02 = 7,625.40 : x
2. Step 2: Convert to fraction form
   12,402.72/17,116.02 = 7,625.40/x
3. Step 3: Cross multiply
   12,402.72x = 17,116.02 × 7,625.40
4. Step 4: Simplify right side
   12,402.72x = 130,516,498.91
5. Step 5: Solve for x
   x = 130,516,498.91/12,402.72
6. Step 6: Final answer
   x = 10,523.22