Finding the Fourth Proportional to 8,076.75, 12,123.30 and 5,739.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,076.75 : 12,123.30 = 5,739.40 : x
2. Step 2: Convert to fraction form
   8,076.75/12,123.30 = 5,739.40/x
3. Step 3: Cross multiply
   8,076.75x = 12,123.30 × 5,739.40
4. Step 4: Simplify right side
   8,076.75x = 69,580,468.02
5. Step 5: Solve for x
   x = 69,580,468.02/8,076.75
6. Step 6: Final answer
   x = 8,614.91