Finding the Fourth Proportional to 12,414.78, 17,130.96 and 7,109.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,414.78 : 17,130.96 = 7,109.28 : x
2. Step 2: Convert to fraction form
   12,414.78/17,130.96 = 7,109.28/x
3. Step 3: Cross multiply
   12,414.78x = 17,130.96 × 7,109.28
4. Step 4: Simplify right side
   12,414.78x = 121,788,791.31
5. Step 5: Solve for x
   x = 121,788,791.31/12,414.78
6. Step 6: Final answer
   x = 9,809.98