Finding the Fourth Proportional to 7,499.96, 10,345.92 and 5,728.40

Step by Step Solution

1. Step 1: Write the proportion equation
   7,499.96 : 10,345.92 = 5,728.40 : x
2. Step 2: Convert to fraction form
   7,499.96/10,345.92 = 5,728.40/x
3. Step 3: Cross multiply
   7,499.96x = 10,345.92 × 5,728.40
4. Step 4: Simplify right side
   7,499.96x = 59,265,568.13
5. Step 5: Solve for x
   x = 59,265,568.13/7,499.96
6. Step 6: Final answer
   x = 7,902.12