Finding the Third Proportional to 31,810 and 68,858

Step by Step Solution

1. Step 1: Write the proportion equation
   31,810 : 68,858 = 68,858 : x
2. Step 2: Convert to fraction form
   31,810/68,858 = 68,858/x
3. Step 3: Cross multiply
   31,810x = 68,858 × 68,858
4. Step 4: Simplify right side
   31,810x = 4,741,424,164
5. Step 5: Solve for x
   x = 4,741,424,164/31,810
6. Step 6: Final answer
   x = 149,054.52