Finding the Fourth Proportional to 12,724.72, 19,088.90 and 3,960.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.72 : 19,088.90 = 3,960.34 : x
2. Step 2: Convert to fraction form
   12,724.72/19,088.90 = 3,960.34/x
3. Step 3: Cross multiply
   12,724.72x = 19,088.90 × 3,960.34
4. Step 4: Simplify right side
   12,724.72x = 75,598,534.23
5. Step 5: Solve for x
   x = 75,598,534.23/12,724.72
6. Step 6: Final answer
   x = 5,941.08