Finding the Fourth Proportional to 23,199.59, 32,013.67 and 13,639.86

Step by Step Solution

1. Step 1: Write the proportion equation
   23,199.59 : 32,013.67 = 13,639.86 : x
2. Step 2: Convert to fraction form
   23,199.59/32,013.67 = 13,639.86/x
3. Step 3: Cross multiply
   23,199.59x = 32,013.67 × 13,639.86
4. Step 4: Simplify right side
   23,199.59x = 436,661,976.89
5. Step 5: Solve for x
   x = 436,661,976.89/23,199.59
6. Step 6: Final answer
   x = 18,821.97