Finding the Fourth Proportional to 10,119.72, 13,963.98 and 5,643.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,119.72 : 13,963.98 = 5,643.72 : x
2. Step 2: Convert to fraction form
   10,119.72/13,963.98 = 5,643.72/x
3. Step 3: Cross multiply
   10,119.72x = 13,963.98 × 5,643.72
4. Step 4: Simplify right side
   10,119.72x = 78,808,793.21
5. Step 5: Solve for x
   x = 78,808,793.21/10,119.72
6. Step 6: Final answer
   x = 7,787.65