Finding the Fourth Proportional to 57,078.56, 78,766.37 and 31,584.48

Step by Step Solution

1. Step 1: Write the proportion equation
   57,078.56 : 78,766.37 = 31,584.48 : x
2. Step 2: Convert to fraction form
   57,078.56/78,766.37 = 31,584.48/x
3. Step 3: Cross multiply
   57,078.56x = 78,766.37 × 31,584.48
4. Step 4: Simplify right side
   57,078.56x = 2,487,794,837.94
5. Step 5: Solve for x
   x = 2,487,794,837.94/57,078.56
6. Step 6: Final answer
   x = 43,585.45