Finding the Fourth Proportional to 5,401.50, 8,101.56 and 2,116.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,401.50 : 8,101.56 = 2,116.90 : x
2. Step 2: Convert to fraction form
   5,401.50/8,101.56 = 2,116.90/x
3. Step 3: Cross multiply
   5,401.50x = 8,101.56 × 2,116.90
4. Step 4: Simplify right side
   5,401.50x = 17,150,151.86
5. Step 5: Solve for x
   x = 17,150,151.86/5,401.50
6. Step 6: Final answer
   x = 3,175.08