Finding the Fourth Proportional to 8,438.56, 12,650.66 and 5,153.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,438.56 : 12,650.66 = 5,153.96 : x
2. Step 2: Convert to fraction form
   8,438.56/12,650.66 = 5,153.96/x
3. Step 3: Cross multiply
   8,438.56x = 12,650.66 × 5,153.96
4. Step 4: Simplify right side
   8,438.56x = 65,200,995.61
5. Step 5: Solve for x
   x = 65,200,995.61/8,438.56
6. Step 6: Final answer
   x = 7,726.55