Finding the Fourth Proportional to 8,771.31, 12,100.95 and 5,583.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,771.31 : 12,100.95 = 5,583.78 : x
2. Step 2: Convert to fraction form
   8,771.31/12,100.95 = 5,583.78/x
3. Step 3: Cross multiply
   8,771.31x = 12,100.95 × 5,583.78
4. Step 4: Simplify right side
   8,771.31x = 67,569,042.59
5. Step 5: Solve for x
   x = 67,569,042.59/8,771.31
6. Step 6: Final answer
   x = 7,703.42