Finding the Fourth Proportional to 58,728.83, 81,046.38 and 31,871.57

Step by Step Solution

1. Step 1: Write the proportion equation
   58,728.83 : 81,046.38 = 31,871.57 : x
2. Step 2: Convert to fraction form
   58,728.83/81,046.38 = 31,871.57/x
3. Step 3: Cross multiply
   58,728.83x = 81,046.38 × 31,871.57
4. Step 4: Simplify right side
   58,728.83x = 2,583,074,968.18
5. Step 5: Solve for x
   x = 2,583,074,968.18/58,728.83
6. Step 6: Final answer
   x = 43,983.09