Finding the Fourth Proportional to 8,743.56, 12,061.63 and 5,720.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,743.56 : 12,061.63 = 5,720.46 : x
2. Step 2: Convert to fraction form
   8,743.56/12,061.63 = 5,720.46/x
3. Step 3: Cross multiply
   8,743.56x = 12,061.63 × 5,720.46
4. Step 4: Simplify right side
   8,743.56x = 68,998,071.95
5. Step 5: Solve for x
   x = 68,998,071.95/8,743.56
6. Step 6: Final answer
   x = 7,891.30