Finding the Third Proportional to 57,085.54 and 86,974.78

Step by Step Solution

1. Step 1: Write the proportion equation
   57,085.54 : 86,974.78 = 86,974.78 : x
2. Step 2: Convert to fraction form
   57,085.54/86,974.78 = 86,974.78/x
3. Step 3: Cross multiply
   57,085.54x = 86,974.78 × 86,974.78
4. Step 4: Simplify right side
   57,085.54x = 7,564,612,063.87
5. Step 5: Solve for x
   x = 7,564,612,063.87/57,085.54
6. Step 6: Final answer
   x = 132,513.63