Finding the Fourth Proportional to 57,978.51, 86,894.92 and 31,323.43

Step by Step Solution

1. Step 1: Write the proportion equation
   57,978.51 : 86,894.92 = 31,323.43 : x
2. Step 2: Convert to fraction form
   57,978.51/86,894.92 = 31,323.43/x
3. Step 3: Cross multiply
   57,978.51x = 86,894.92 × 31,323.43
4. Step 4: Simplify right side
   57,978.51x = 2,721,846,943.98
5. Step 5: Solve for x
   x = 2,721,846,943.98/57,978.51
6. Step 6: Final answer
   x = 46,945.79