Finding the Fourth Proportional to 51,705.31, 71,381.72 and 31,291.18

Step by Step Solution

1. Step 1: Write the proportion equation
   51,705.31 : 71,381.72 = 31,291.18 : x
2. Step 2: Convert to fraction form
   51,705.31/71,381.72 = 31,291.18/x
3. Step 3: Cross multiply
   51,705.31x = 71,381.72 × 31,291.18
4. Step 4: Simplify right side
   51,705.31x = 2,233,618,249.23
5. Step 5: Solve for x
   x = 2,233,618,249.23/51,705.31
6. Step 6: Final answer
   x = 43,199.01