Finding the Fourth Proportional to 42,449.91, 63,888.01 and 31,974.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,449.91 : 63,888.01 = 31,974.18 : x
2. Step 2: Convert to fraction form
   42,449.91/63,888.01 = 31,974.18/x
3. Step 3: Cross multiply
   42,449.91x = 63,888.01 × 31,974.18
4. Step 4: Simplify right side
   42,449.91x = 2,042,766,731.58
5. Step 5: Solve for x
   x = 2,042,766,731.58/42,449.91
6. Step 6: Final answer
   x = 48,121.82