Finding the Third Proportional to 31,173 and 68,908

Step by Step Solution

1. Step 1: Write the proportion equation
   31,173 : 68,908 = 68,908 : x
2. Step 2: Convert to fraction form
   31,173/68,908 = 68,908/x
3. Step 3: Cross multiply
   31,173x = 68,908 × 68,908
4. Step 4: Simplify right side
   31,173x = 4,748,312,464
5. Step 5: Solve for x
   x = 4,748,312,464/31,173
6. Step 6: Final answer
   x = 152,321.32