Finding the Third Proportional to 57,630 and 85,610

Step by Step Solution

1. Step 1: Write the proportion equation
   57,630 : 85,610 = 85,610 : x
2. Step 2: Convert to fraction form
   57,630/85,610 = 85,610/x
3. Step 3: Cross multiply
   57,630x = 85,610 × 85,610
4. Step 4: Simplify right side
   57,630x = 7,329,072,100
5. Step 5: Solve for x
   x = 7,329,072,100/57,630
6. Step 6: Final answer
   x = 127,174.60