Finding the Fourth Proportional to 12,322.68, 18,499.91 and 10,578.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,322.68 : 18,499.91 = 10,578.89 : x
2. Step 2: Convert to fraction form
   12,322.68/18,499.91 = 10,578.89/x
3. Step 3: Cross multiply
   12,322.68x = 18,499.91 × 10,578.89
4. Step 4: Simplify right side
   12,322.68x = 195,708,417.07
5. Step 5: Solve for x
   x = 195,708,417.07/12,322.68
6. Step 6: Final answer
   x = 15,881.97