Finding the Fourth Proportional to 21,517.12, 32,280.27 and 7,477.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,517.12 : 32,280.27 = 7,477.57 : x
2. Step 2: Convert to fraction form
   21,517.12/32,280.27 = 7,477.57/x
3. Step 3: Cross multiply
   21,517.12x = 32,280.27 × 7,477.57
4. Step 4: Simplify right side
   21,517.12x = 241,377,978.54
5. Step 5: Solve for x
   x = 241,377,978.54/21,517.12
6. Step 6: Final answer
   x = 11,217.95