Finding the Third Proportional to 57,145 and 85,662

Step by Step Solution

1. Step 1: Write the proportion equation
   57,145 : 85,662 = 85,662 : x
2. Step 2: Convert to fraction form
   57,145/85,662 = 85,662/x
3. Step 3: Cross multiply
   57,145x = 85,662 × 85,662
4. Step 4: Simplify right side
   57,145x = 7,337,978,244
5. Step 5: Solve for x
   x = 7,337,978,244/57,145
6. Step 6: Final answer
   x = 128,409.80