Finding the Fourth Proportional to 12,417.11, 17,130.77 and 7,109.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,417.11 : 17,130.77 = 7,109.09 : x
2. Step 2: Convert to fraction form
   12,417.11/17,130.77 = 7,109.09/x
3. Step 3: Cross multiply
   12,417.11x = 17,130.77 × 7,109.09
4. Step 4: Simplify right side
   12,417.11x = 121,784,150.15
5. Step 5: Solve for x
   x = 121,784,150.15/12,417.11
6. Step 6: Final answer
   x = 9,807.77