Finding the Third Proportional to 31,198.50 and 66,774.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,198.50 : 66,774.38 = 66,774.38 : x
2. Step 2: Convert to fraction form
   31,198.50/66,774.38 = 66,774.38/x
3. Step 3: Cross multiply
   31,198.50x = 66,774.38 × 66,774.38
4. Step 4: Simplify right side
   31,198.50x = 4,458,817,156.64
5. Step 5: Solve for x
   x = 4,458,817,156.64/31,198.50
6. Step 6: Final answer
   x = 142,917.68