Finding the Fourth Proportional to 12,691.20, 17,514.74 and 7,026.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.20 : 17,514.74 = 7,026.18 : x
2. Step 2: Convert to fraction form
   12,691.20/17,514.74 = 7,026.18/x
3. Step 3: Cross multiply
   12,691.20x = 17,514.74 × 7,026.18
4. Step 4: Simplify right side
   12,691.20x = 123,061,715.89
5. Step 5: Solve for x
   x = 123,061,715.89/12,691.20
6. Step 6: Final answer
   x = 9,696.62