Finding the Fourth Proportional to 21,456.88, 32,177.43 and 7,413.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456.88 : 32,177.43 = 7,413.31 : x
2. Step 2: Convert to fraction form
   21,456.88/32,177.43 = 7,413.31/x
3. Step 3: Cross multiply
   21,456.88x = 32,177.43 × 7,413.31
4. Step 4: Simplify right side
   21,456.88x = 238,541,263.59
5. Step 5: Solve for x
   x = 238,541,263.59/21,456.88
6. Step 6: Final answer
   x = 11,117.24