Finding the Third Proportional to 31,171.50 and 68,343.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,171.50 : 68,343.75 = 68,343.75 : x
2. Step 2: Convert to fraction form
   31,171.50/68,343.75 = 68,343.75/x
3. Step 3: Cross multiply
   31,171.50x = 68,343.75 × 68,343.75
4. Step 4: Simplify right side
   31,171.50x = 4,670,868,164.06
5. Step 5: Solve for x
   x = 4,670,868,164.06/31,171.50
6. Step 6: Final answer
   x = 149,844.19