Finding the Fourth Proportional to 12,255.52, 18,385 and 4,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,255.52 : 18,385 = 4,860.72 : x
2. Step 2: Convert to fraction form
   12,255.52/18,385 = 4,860.72/x
3. Step 3: Cross multiply
   12,255.52x = 18,385 × 4,860.72
4. Step 4: Simplify right side
   12,255.52x = 89,364,337.20
5. Step 5: Solve for x
   x = 89,364,337.20/12,255.52
6. Step 6: Final answer
   x = 7,291.76