Finding the Fourth Proportional to 28,064.48, 42,096.24 and 7,288.16

Step by Step Solution

1. Step 1: Write the proportion equation
   28,064.48 : 42,096.24 = 7,288.16 : x
2. Step 2: Convert to fraction form
   28,064.48/42,096.24 = 7,288.16/x
3. Step 3: Cross multiply
   28,064.48x = 42,096.24 × 7,288.16
4. Step 4: Simplify right side
   28,064.48x = 306,804,132.52
5. Step 5: Solve for x
   x = 306,804,132.52/28,064.48
6. Step 6: Final answer
   x = 10,932.12