Finding the Fourth Proportional to 12,486.42, 17,229.29 and 7,180.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,486.42 : 17,229.29 = 7,180.18 : x
2. Step 2: Convert to fraction form
   12,486.42/17,229.29 = 7,180.18/x
3. Step 3: Cross multiply
   12,486.42x = 17,229.29 × 7,180.18
4. Step 4: Simplify right side
   12,486.42x = 123,709,403.47
5. Step 5: Solve for x
   x = 123,709,403.47/12,486.42
6. Step 6: Final answer
   x = 9,907.52