Finding the Fourth Proportional to 7,718.72, 10,647.84 and 5,362.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,718.72 : 10,647.84 = 5,362.88 : x
2. Step 2: Convert to fraction form
   7,718.72/10,647.84 = 5,362.88/x
3. Step 3: Cross multiply
   7,718.72x = 10,647.84 × 5,362.88
4. Step 4: Simplify right side
   7,718.72x = 57,103,088.18
5. Step 5: Solve for x
   x = 57,103,088.18/7,718.72
6. Step 6: Final answer
   x = 7,398.00