Finding the Fourth Proportional to 8,742.56, 12,060.25 and 5,719.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,742.56 : 12,060.25 = 5,719.46 : x
2. Step 2: Convert to fraction form
   8,742.56/12,060.25 = 5,719.46/x
3. Step 3: Cross multiply
   8,742.56x = 12,060.25 × 5,719.46
4. Step 4: Simplify right side
   8,742.56x = 68,978,042.87
5. Step 5: Solve for x
   x = 68,978,042.87/8,742.56
6. Step 6: Final answer
   x = 7,889.92