Finding the Fourth Proportional to 13,391.86, 18,483.05 and 7,725.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,391.86 : 18,483.05 = 7,725.59 : x
2. Step 2: Convert to fraction form
   13,391.86/18,483.05 = 7,725.59/x
3. Step 3: Cross multiply
   13,391.86x = 18,483.05 × 7,725.59
4. Step 4: Simplify right side
   13,391.86x = 142,792,466.25
5. Step 5: Solve for x
   x = 142,792,466.25/13,391.86
6. Step 6: Final answer
   x = 10,662.63