Finding the Fourth Proportional to 57,016.50, 78,685.20 and 31,866

Step by Step Solution

1. Step 1: Write the proportion equation
   57,016.50 : 78,685.20 = 31,866 : x
2. Step 2: Convert to fraction form
   57,016.50/78,685.20 = 31,866/x
3. Step 3: Cross multiply
   57,016.50x = 78,685.20 × 31,866
4. Step 4: Simplify right side
   57,016.50x = 2,507,382,583.20
5. Step 5: Solve for x
   x = 2,507,382,583.20/57,016.50
6. Step 6: Final answer
   x = 43,976.44