Finding the Fourth Proportional to 12,388.40, 17,097.16 and 7,082.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.40 : 17,097.16 = 7,082.18 : x
2. Step 2: Convert to fraction form
   12,388.40/17,097.16 = 7,082.18/x
3. Step 3: Cross multiply
   12,388.40x = 17,097.16 × 7,082.18
4. Step 4: Simplify right side
   12,388.40x = 121,085,079.12
5. Step 5: Solve for x
   x = 121,085,079.12/12,388.40
6. Step 6: Final answer
   x = 9,774.07