Finding the Fourth Proportional to 31,290.10, 43,194.27 and 19,974.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,290.10 : 43,194.27 = 19,974.54 : x
2. Step 2: Convert to fraction form
   31,290.10/43,194.27 = 19,974.54/x
3. Step 3: Cross multiply
   31,290.10x = 43,194.27 × 19,974.54
4. Step 4: Simplify right side
   31,290.10x = 862,785,673.89
5. Step 5: Solve for x
   x = 862,785,673.89/31,290.10
6. Step 6: Final answer
   x = 27,573.76