Finding the Fourth Proportional to 23,105.79, 31,885.89 and 12,495.39

Step by Step Solution

1. Step 1: Write the proportion equation
   23,105.79 : 31,885.89 = 12,495.39 : x
2. Step 2: Convert to fraction form
   23,105.79/31,885.89 = 12,495.39/x
3. Step 3: Cross multiply
   23,105.79x = 31,885.89 × 12,495.39
4. Step 4: Simplify right side
   23,105.79x = 398,426,631.05
5. Step 5: Solve for x
   x = 398,426,631.05/23,105.79
6. Step 6: Final answer
   x = 17,243.58