Finding the Fourth Proportional to 8,761.50, 12,100.59 and 5,790.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,761.50 : 12,100.59 = 5,790.42 : x
2. Step 2: Convert to fraction form
   8,761.50/12,100.59 = 5,790.42/x
3. Step 3: Cross multiply
   8,761.50x = 12,100.59 × 5,790.42
4. Step 4: Simplify right side
   8,761.50x = 70,067,498.35
5. Step 5: Solve for x
   x = 70,067,498.35/8,761.50
6. Step 6: Final answer
   x = 7,997.20