Finding the Fourth Proportional to 5,401.86, 8,100.18 and 2,478.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,401.86 : 8,100.18 = 2,478.30 : x
2. Step 2: Convert to fraction form
   5,401.86/8,100.18 = 2,478.30/x
3. Step 3: Cross multiply
   5,401.86x = 8,100.18 × 2,478.30
4. Step 4: Simplify right side
   5,401.86x = 20,074,676.09
5. Step 5: Solve for x
   x = 20,074,676.09/5,401.86
6. Step 6: Final answer
   x = 3,716.25