Finding the Fourth Proportional to 21,621.76, 32,413.12 and 7,767.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,621.76 : 32,413.12 = 7,767.52 : x
2. Step 2: Convert to fraction form
   21,621.76/32,413.12 = 7,767.52/x
3. Step 3: Cross multiply
   21,621.76x = 32,413.12 × 7,767.52
4. Step 4: Simplify right side
   21,621.76x = 251,769,557.86
5. Step 5: Solve for x
   x = 251,769,557.86/21,621.76
6. Step 6: Final answer
   x = 11,644.27