Finding the Fourth Proportional to 13,192.86, 18,205.31 and 7,224.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,192.86 : 18,205.31 = 7,224.60 : x
2. Step 2: Convert to fraction form
   13,192.86/18,205.31 = 7,224.60/x
3. Step 3: Cross multiply
   13,192.86x = 18,205.31 × 7,224.60
4. Step 4: Simplify right side
   13,192.86x = 131,526,100.69
5. Step 5: Solve for x
   x = 131,526,100.69/13,192.86
6. Step 6: Final answer
   x = 9,969.49