Finding the Third Proportional to 31,171.50 and 66,774

Step by Step Solution

1. Step 1: Write the proportion equation
   31,171.50 : 66,774 = 66,774 : x
2. Step 2: Convert to fraction form
   31,171.50/66,774 = 66,774/x
3. Step 3: Cross multiply
   31,171.50x = 66,774 × 66,774
4. Step 4: Simplify right side
   31,171.50x = 4,458,767,076
5. Step 5: Solve for x
   x = 4,458,767,076/31,171.50
6. Step 6: Final answer
   x = 143,039.86