Finding the Fourth Proportional to 8,641.86, 12,962.76 and 3,451.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,641.86 : 12,962.76 = 3,451.38 : x
2. Step 2: Convert to fraction form
   8,641.86/12,962.76 = 3,451.38/x
3. Step 3: Cross multiply
   8,641.86x = 12,962.76 × 3,451.38
4. Step 4: Simplify right side
   8,641.86x = 44,739,410.61
5. Step 5: Solve for x
   x = 44,739,410.61/8,641.86
6. Step 6: Final answer
   x = 5,177.06