Finding the Fourth Proportional to 12,691.35, 17,513.80 and 7,026.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.35 : 17,513.80 = 7,026.10 : x
2. Step 2: Convert to fraction form
   12,691.35/17,513.80 = 7,026.10/x
3. Step 3: Cross multiply
   12,691.35x = 17,513.80 × 7,026.10
4. Step 4: Simplify right side
   12,691.35x = 123,053,648.83
5. Step 5: Solve for x
   x = 123,053,648.83/12,691.35
6. Step 6: Final answer
   x = 9,695.87