Finding the Fourth Proportional to 5,436.93, 7,499.79 and 3,078.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,436.93 : 7,499.79 = 3,078.61 : x
2. Step 2: Convert to fraction form
   5,436.93/7,499.79 = 3,078.61/x
3. Step 3: Cross multiply
   5,436.93x = 7,499.79 × 3,078.61
4. Step 4: Simplify right side
   5,436.93x = 23,088,928.49
5. Step 5: Solve for x
   x = 23,088,928.49/5,436.93
6. Step 6: Final answer
   x = 4,246.68