Finding the Third Proportional to 57,726 and 86,357.25

Step by Step Solution

1. Step 1: Write the proportion equation
   57,726 : 86,357.25 = 86,357.25 : x
2. Step 2: Convert to fraction form
   57,726/86,357.25 = 86,357.25/x
3. Step 3: Cross multiply
   57,726x = 86,357.25 × 86,357.25
4. Step 4: Simplify right side
   57,726x = 7,457,574,627.56
5. Step 5: Solve for x
   x = 7,457,574,627.56/57,726
6. Step 6: Final answer
   x = 129,189.18