Finding the Fourth Proportional to 13,280.16, 18,326.88 and 7,694.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280.16 : 18,326.88 = 7,694.40 : x
2. Step 2: Convert to fraction form
   13,280.16/18,326.88 = 7,694.40/x
3. Step 3: Cross multiply
   13,280.16x = 18,326.88 × 7,694.40
4. Step 4: Simplify right side
   13,280.16x = 141,014,345.47
5. Step 5: Solve for x
   x = 141,014,345.47/13,280.16
6. Step 6: Final answer
   x = 10,618.42