Finding the Fourth Proportional to 21,152.52, 31,728.85 and 5,357.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.52 : 31,728.85 = 5,357.54 : x
2. Step 2: Convert to fraction form
   21,152.52/31,728.85 = 5,357.54/x
3. Step 3: Cross multiply
   21,152.52x = 31,728.85 × 5,357.54
4. Step 4: Simplify right side
   21,152.52x = 169,988,583.03
5. Step 5: Solve for x
   x = 169,988,583.03/21,152.52
6. Step 6: Final answer
   x = 8,036.33