Finding the Fourth Proportional to 10,978.92, 16,470.81 and 3,187.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.92 : 16,470.81 = 3,187.26 : x
2. Step 2: Convert to fraction form
   10,978.92/16,470.81 = 3,187.26/x
3. Step 3: Cross multiply
   10,978.92x = 16,470.81 × 3,187.26
4. Step 4: Simplify right side
   10,978.92x = 52,496,753.88
5. Step 5: Solve for x
   x = 52,496,753.88/10,978.92
6. Step 6: Final answer
   x = 4,781.60