Finding the Fourth Proportional to 5,411.10, 8,117.55 and 2,124.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,411.10 : 8,117.55 = 2,124.30 : x
2. Step 2: Convert to fraction form
   5,411.10/8,117.55 = 2,124.30/x
3. Step 3: Cross multiply
   5,411.10x = 8,117.55 × 2,124.30
4. Step 4: Simplify right side
   5,411.10x = 17,244,111.47
5. Step 5: Solve for x
   x = 17,244,111.47/5,411.10
6. Step 6: Final answer
   x = 3,186.80