Finding the Fourth Proportional to 5,436.30, 7,502.34 and 3,078.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,436.30 : 7,502.34 = 3,078.39 : x
2. Step 2: Convert to fraction form
   5,436.30/7,502.34 = 3,078.39/x
3. Step 3: Cross multiply
   5,436.30x = 7,502.34 × 3,078.39
4. Step 4: Simplify right side
   5,436.30x = 23,095,128.43
5. Step 5: Solve for x
   x = 23,095,128.43/5,436.30
6. Step 6: Final answer
   x = 4,248.32