Finding the Fourth Proportional to 12,451.86, 17,182.53 and 7,145.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,451.86 : 17,182.53 = 7,145.55 : x
2. Step 2: Convert to fraction form
   12,451.86/17,182.53 = 7,145.55/x
3. Step 3: Cross multiply
   12,451.86x = 17,182.53 × 7,145.55
4. Step 4: Simplify right side
   12,451.86x = 122,778,627.24
5. Step 5: Solve for x
   x = 122,778,627.24/12,451.86
6. Step 6: Final answer
   x = 9,860.26