Finding the Fourth Proportional to 12,691.49, 17,513.88 and 7,026.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.49 : 17,513.88 = 7,026.05 : x
2. Step 2: Convert to fraction form
   12,691.49/17,513.88 = 7,026.05/x
3. Step 3: Cross multiply
   12,691.49x = 17,513.88 × 7,026.05
4. Step 4: Simplify right side
   12,691.49x = 123,053,396.57
5. Step 5: Solve for x
   x = 123,053,396.57/12,691.49
6. Step 6: Final answer
   x = 9,695.74