Finding the Third Proportional to 62,810 and 85,290

Step by Step Solution

1. Step 1: Write the proportion equation
   62,810 : 85,290 = 85,290 : x
2. Step 2: Convert to fraction form
   62,810/85,290 = 85,290/x
3. Step 3: Cross multiply
   62,810x = 85,290 × 85,290
4. Step 4: Simplify right side
   62,810x = 7,274,384,100
5. Step 5: Solve for x
   x = 7,274,384,100/62,810
6. Step 6: Final answer
   x = 115,815.70