Finding the Third Proportional to 57,921.75 and 86,375.25

Step by Step Solution

1. Step 1: Write the proportion equation
   57,921.75 : 86,375.25 = 86,375.25 : x
2. Step 2: Convert to fraction form
   57,921.75/86,375.25 = 86,375.25/x
3. Step 3: Cross multiply
   57,921.75x = 86,375.25 × 86,375.25
4. Step 4: Simplify right side
   57,921.75x = 7,460,683,812.56
5. Step 5: Solve for x
   x = 7,460,683,812.56/57,921.75
6. Step 6: Final answer
   x = 128,806.26