Finding the Fourth Proportional to 12,396.40, 17,108.22 and 7,090.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,396.40 : 17,108.22 = 7,090.18 : x
2. Step 2: Convert to fraction form
   12,396.40/17,108.22 = 7,090.18/x
3. Step 3: Cross multiply
   12,396.40x = 17,108.22 × 7,090.18
4. Step 4: Simplify right side
   12,396.40x = 121,300,359.28
5. Step 5: Solve for x
   x = 121,300,359.28/12,396.40
6. Step 6: Final answer
   x = 9,785.13