Finding the Fourth Proportional to 12,690.90, 17,513.05 and 7,025.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,690.90 : 17,513.05 = 7,025.88 : x
2. Step 2: Convert to fraction form
   12,690.90/17,513.05 = 7,025.88/x
3. Step 3: Cross multiply
   12,690.90x = 17,513.05 × 7,025.88
4. Step 4: Simplify right side
   12,690.90x = 123,044,587.73
5. Step 5: Solve for x
   x = 123,044,587.73/12,690.90
6. Step 6: Final answer
   x = 9,695.50