Finding the Fourth Proportional to 23,172.86, 31,947.62 and 18,408.61

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172.86 : 31,947.62 = 18,408.61 : x
2. Step 2: Convert to fraction form
   23,172.86/31,947.62 = 18,408.61/x
3. Step 3: Cross multiply
   23,172.86x = 31,947.62 × 18,408.61
4. Step 4: Simplify right side
   23,172.86x = 588,111,269.83
5. Step 5: Solve for x
   x = 588,111,269.83/23,172.86
6. Step 6: Final answer
   x = 25,379.32