Finding the Fourth Proportional to 5,436.78, 7,502.76 and 3,078.84

Step by Step Solution

1. Step 1: Write the proportion equation
   5,436.78 : 7,502.76 = 3,078.84 : x
2. Step 2: Convert to fraction form
   5,436.78/7,502.76 = 3,078.84/x
3. Step 3: Cross multiply
   5,436.78x = 7,502.76 × 3,078.84
4. Step 4: Simplify right side
   5,436.78x = 23,099,797.60
5. Step 5: Solve for x
   x = 23,099,797.60/5,436.78
6. Step 6: Final answer
   x = 4,248.80