Finding the Fourth Proportional to 5,436.20, 7,502.42 and 3,078.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,436.20 : 7,502.42 = 3,078.76 : x
2. Step 2: Convert to fraction form
   5,436.20/7,502.42 = 3,078.76/x
3. Step 3: Cross multiply
   5,436.20x = 7,502.42 × 3,078.76
4. Step 4: Simplify right side
   5,436.20x = 23,098,150.60
5. Step 5: Solve for x
   x = 23,098,150.60/5,436.20
6. Step 6: Final answer
   x = 4,248.95