Finding the Fourth Proportional to 14,111.10, 21,158.55 and 4,248.90

Step by Step Solution

1. Step 1: Write the proportion equation
   14,111.10 : 21,158.55 = 4,248.90 : x
2. Step 2: Convert to fraction form
   14,111.10/21,158.55 = 4,248.90/x
3. Step 3: Cross multiply
   14,111.10x = 21,158.55 × 4,248.90
4. Step 4: Simplify right side
   14,111.10x = 89,900,563.10
5. Step 5: Solve for x
   x = 89,900,563.10/14,111.10
6. Step 6: Final answer
   x = 6,370.91