Finding the Fourth Proportional to 8,711.78, 13,042.83 and 5,784.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,711.78 : 13,042.83 = 5,784.26 : x
2. Step 2: Convert to fraction form
   8,711.78/13,042.83 = 5,784.26/x
3. Step 3: Cross multiply
   8,711.78x = 13,042.83 × 5,784.26
4. Step 4: Simplify right side
   8,711.78x = 75,443,119.86
5. Step 5: Solve for x
   x = 75,443,119.86/8,711.78
6. Step 6: Final answer
   x = 8,659.90