Finding the Fourth Proportional to 31,919.86, 44,042.70 and 18,490.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,919.86 : 44,042.70 = 18,490.31 : x
2. Step 2: Convert to fraction form
   31,919.86/44,042.70 = 18,490.31/x
3. Step 3: Cross multiply
   31,919.86x = 44,042.70 × 18,490.31
4. Step 4: Simplify right side
   31,919.86x = 814,362,956.02
5. Step 5: Solve for x
   x = 814,362,956.02/31,919.86
6. Step 6: Final answer
   x = 25,512.74