Finding the Fourth Proportional to 12,691.40, 17,513.75 and 7,026.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.40 : 17,513.75 = 7,026.38 : x
2. Step 2: Convert to fraction form
   12,691.40/17,513.75 = 7,026.38/x
3. Step 3: Cross multiply
   12,691.40x = 17,513.75 × 7,026.38
4. Step 4: Simplify right side
   12,691.40x = 123,058,140.02
5. Step 5: Solve for x
   x = 123,058,140.02/12,691.40
6. Step 6: Final answer
   x = 9,696.19