Finding the Fourth Proportional to 13,465.38, 18,581.61 and 7,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,465.38 : 18,581.61 = 7,718.72 : x
2. Step 2: Convert to fraction form
   13,465.38/18,581.61 = 7,718.72/x
3. Step 3: Cross multiply
   13,465.38x = 18,581.61 × 7,718.72
4. Step 4: Simplify right side
   13,465.38x = 143,426,151.83
5. Step 5: Solve for x
   x = 143,426,151.83/13,465.38
6. Step 6: Final answer
   x = 10,651.47