Finding the Fourth Proportional to 23,600.56, 32,568.78 and 12,990.19

Step by Step Solution

1. Step 1: Write the proportion equation
   23,600.56 : 32,568.78 = 12,990.19 : x
2. Step 2: Convert to fraction form
   23,600.56/32,568.78 = 12,990.19/x
3. Step 3: Cross multiply
   23,600.56x = 32,568.78 × 12,990.19
4. Step 4: Simplify right side
   23,600.56x = 423,074,640.27
5. Step 5: Solve for x
   x = 423,074,640.27/23,600.56
6. Step 6: Final answer
   x = 17,926.47