Finding the Fourth Proportional to 8,471.15, 12,689.72 and 4,767.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,471.15 : 12,689.72 = 4,767.83 : x
2. Step 2: Convert to fraction form
   8,471.15/12,689.72 = 4,767.83/x
3. Step 3: Cross multiply
   8,471.15x = 12,689.72 × 4,767.83
4. Step 4: Simplify right side
   8,471.15x = 60,502,403.87
5. Step 5: Solve for x
   x = 60,502,403.87/8,471.15
6. Step 6: Final answer
   x = 7,142.17