Finding the Fourth Proportional to 57,688.51, 86,481.33 and 31,048.81

Step by Step Solution

1. Step 1: Write the proportion equation
   57,688.51 : 86,481.33 = 31,048.81 : x
2. Step 2: Convert to fraction form
   57,688.51/86,481.33 = 31,048.81/x
3. Step 3: Cross multiply
   57,688.51x = 86,481.33 × 31,048.81
4. Step 4: Simplify right side
   57,688.51x = 2,685,142,383.72
5. Step 5: Solve for x
   x = 2,685,142,383.72/57,688.51
6. Step 6: Final answer
   x = 46,545.53