Finding the Fourth Proportional to 5,385.60, 8,081.52 and 3,198.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,385.60 : 8,081.52 = 3,198.56 : x
2. Step 2: Convert to fraction form
   5,385.60/8,081.52 = 3,198.56/x
3. Step 3: Cross multiply
   5,385.60x = 8,081.52 × 3,198.56
4. Step 4: Simplify right side
   5,385.60x = 25,849,226.61
5. Step 5: Solve for x
   x = 25,849,226.61/5,385.60
6. Step 6: Final answer
   x = 4,799.69