Finding the Fourth Proportional to 13,462.71, 18,578.38 and 7,873.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,462.71 : 18,578.38 = 7,873.71 : x
2. Step 2: Convert to fraction form
   13,462.71/18,578.38 = 7,873.71/x
3. Step 3: Cross multiply
   13,462.71x = 18,578.38 × 7,873.71
4. Step 4: Simplify right side
   13,462.71x = 146,280,776.39
5. Step 5: Solve for x
   x = 146,280,776.39/13,462.71
6. Step 6: Final answer
   x = 10,865.63