Finding the Fourth Proportional to 21,456.48, 32,175.60 and 9,777.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456.48 : 32,175.60 = 9,777.12 : x
2. Step 2: Convert to fraction form
   21,456.48/32,175.60 = 9,777.12/x
3. Step 3: Cross multiply
   21,456.48x = 32,175.60 × 9,777.12
4. Step 4: Simplify right side
   21,456.48x = 314,584,702.27
5. Step 5: Solve for x
   x = 314,584,702.27/21,456.48
6. Step 6: Final answer
   x = 14,661.52