Finding the Fourth Proportional to 10,303.20, 14,228.52 and 7,124.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,303.20 : 14,228.52 = 7,124.64 : x
2. Step 2: Convert to fraction form
   10,303.20/14,228.52 = 7,124.64/x
3. Step 3: Cross multiply
   10,303.20x = 14,228.52 × 7,124.64
4. Step 4: Simplify right side
   10,303.20x = 101,373,082.73
5. Step 5: Solve for x
   x = 101,373,082.73/10,303.20
6. Step 6: Final answer
   x = 9,838.99