Finding the Fourth Proportional to 5,418.31, 8,128.83 and 2,498.67

Step by Step Solution

1. Step 1: Write the proportion equation
   5,418.31 : 8,128.83 = 2,498.67 : x
2. Step 2: Convert to fraction form
   5,418.31/8,128.83 = 2,498.67/x
3. Step 3: Cross multiply
   5,418.31x = 8,128.83 × 2,498.67
4. Step 4: Simplify right side
   5,418.31x = 20,311,223.01
5. Step 5: Solve for x
   x = 20,311,223.01/5,418.31
6. Step 6: Final answer
   x = 3,748.63