Finding the Fourth Proportional to 13,280.10, 18,326.25 and 7,615.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280.10 : 18,326.25 = 7,615.86 : x
2. Step 2: Convert to fraction form
   13,280.10/18,326.25 = 7,615.86/x
3. Step 3: Cross multiply
   13,280.10x = 18,326.25 × 7,615.86
4. Step 4: Simplify right side
   13,280.10x = 139,570,154.33
5. Step 5: Solve for x
   x = 139,570,154.33/13,280.10
6. Step 6: Final answer
   x = 10,509.72