Finding the Fourth Proportional to 10,840.52, 16,260.86 and 3,915

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840.52 : 16,260.86 = 3,915 : x
2. Step 2: Convert to fraction form
   10,840.52/16,260.86 = 3,915/x
3. Step 3: Cross multiply
   10,840.52x = 16,260.86 × 3,915
4. Step 4: Simplify right side
   10,840.52x = 63,661,266.90
5. Step 5: Solve for x
   x = 63,661,266.90/10,840.52
6. Step 6: Final answer
   x = 5,872.53