Finding the Fourth Proportional to 21,345.28, 32,019.72 and 7,304.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,345.28 : 32,019.72 = 7,304.80 : x
2. Step 2: Convert to fraction form
   21,345.28/32,019.72 = 7,304.80/x
3. Step 3: Cross multiply
   21,345.28x = 32,019.72 × 7,304.80
4. Step 4: Simplify right side
   21,345.28x = 233,897,650.66
5. Step 5: Solve for x
   x = 233,897,650.66/21,345.28
6. Step 6: Final answer
   x = 10,957.82