Finding the Fourth Proportional to 31,072.10, 42,862.65 and 18,494.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,072.10 : 42,862.65 = 18,494.42 : x
2. Step 2: Convert to fraction form
   31,072.10/42,862.65 = 18,494.42/x
3. Step 3: Cross multiply
   31,072.10x = 42,862.65 × 18,494.42
4. Step 4: Simplify right side
   31,072.10x = 792,719,851.41
5. Step 5: Solve for x
   x = 792,719,851.41/31,072.10
6. Step 6: Final answer
   x = 25,512.27