Finding the Fourth Proportional to 8,742.50, 12,061.23 and 5,759.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,742.50 : 12,061.23 = 5,759.90 : x
2. Step 2: Convert to fraction form
   8,742.50/12,061.23 = 5,759.90/x
3. Step 3: Cross multiply
   8,742.50x = 12,061.23 × 5,759.90
4. Step 4: Simplify right side
   8,742.50x = 69,471,478.68
5. Step 5: Solve for x
   x = 69,471,478.68/8,742.50
6. Step 6: Final answer
   x = 7,946.41