Finding the Fourth Proportional to 51,704.31, 71,380.34 and 31,290.18

Step by Step Solution

1. Step 1: Write the proportion equation
   51,704.31 : 71,380.34 = 31,290.18 : x
2. Step 2: Convert to fraction form
   51,704.31/71,380.34 = 31,290.18/x
3. Step 3: Cross multiply
   51,704.31x = 71,380.34 × 31,290.18
4. Step 4: Simplify right side
   51,704.31x = 2,233,503,687.06
5. Step 5: Solve for x
   x = 2,233,503,687.06/51,704.31
6. Step 6: Final answer
   x = 43,197.63