Finding the Fourth Proportional to 12,435.54, 17,158.17 and 9,080.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435.54 : 17,158.17 = 9,080.16 : x
2. Step 2: Convert to fraction form
   12,435.54/17,158.17 = 9,080.16/x
3. Step 3: Cross multiply
   12,435.54x = 17,158.17 × 9,080.16
4. Step 4: Simplify right side
   12,435.54x = 155,798,928.91
5. Step 5: Solve for x
   x = 155,798,928.91/12,435.54
6. Step 6: Final answer
   x = 12,528.52