Finding the Fourth Proportional to 10,219.20, 14,103 and 5,742.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,219.20 : 14,103 = 5,742.72 : x
2. Step 2: Convert to fraction form
   10,219.20/14,103 = 5,742.72/x
3. Step 3: Cross multiply
   10,219.20x = 14,103 × 5,742.72
4. Step 4: Simplify right side
   10,219.20x = 80,989,580.16
5. Step 5: Solve for x
   x = 80,989,580.16/10,219.20
6. Step 6: Final answer
   x = 7,925.24