Finding the Fourth Proportional to 31,071.38, 42,884.06 and 18,323.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,071.38 : 42,884.06 = 18,323.78 : x
2. Step 2: Convert to fraction form
   31,071.38/42,884.06 = 18,323.78/x
3. Step 3: Cross multiply
   31,071.38x = 42,884.06 × 18,323.78
4. Step 4: Simplify right side
   31,071.38x = 785,797,774.91
5. Step 5: Solve for x
   x = 785,797,774.91/31,071.38
6. Step 6: Final answer
   x = 25,290.09