Finding the Fourth Proportional to 8,451.88, 12,689.32 and 4,756.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,451.88 : 12,689.32 = 4,756.72 : x
2. Step 2: Convert to fraction form
   8,451.88/12,689.32 = 4,756.72/x
3. Step 3: Cross multiply
   8,451.88x = 12,689.32 × 4,756.72
4. Step 4: Simplify right side
   8,451.88x = 60,359,542.23
5. Step 5: Solve for x
   x = 60,359,542.23/8,451.88
6. Step 6: Final answer
   x = 7,141.55