Finding the Fourth Proportional to 31,149.69, 42,992.15 and 18,575.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,149.69 : 42,992.15 = 18,575.25 : x
2. Step 2: Convert to fraction form
   31,149.69/42,992.15 = 18,575.25/x
3. Step 3: Cross multiply
   31,149.69x = 42,992.15 × 18,575.25
4. Step 4: Simplify right side
   31,149.69x = 798,589,934.29
5. Step 5: Solve for x
   x = 798,589,934.29/31,149.69
6. Step 6: Final answer
   x = 25,637.17