Finding the Fourth Proportional to 23,099.94, 31,877.94 and 12,489.58

Step by Step Solution

1. Step 1: Write the proportion equation
   23,099.94 : 31,877.94 = 12,489.58 : x
2. Step 2: Convert to fraction form
   23,099.94/31,877.94 = 12,489.58/x
3. Step 3: Cross multiply
   23,099.94x = 31,877.94 × 12,489.58
4. Step 4: Simplify right side
   23,099.94x = 398,142,081.87
5. Step 5: Solve for x
   x = 398,142,081.87/23,099.94
6. Step 6: Final answer
   x = 17,235.63