Finding the Third Proportional to 30,874.50 and 66,426.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,874.50 : 66,426.75 = 66,426.75 : x
2. Step 2: Convert to fraction form
   30,874.50/66,426.75 = 66,426.75/x
3. Step 3: Cross multiply
   30,874.50x = 66,426.75 × 66,426.75
4. Step 4: Simplify right side
   30,874.50x = 4,412,513,115.56
5. Step 5: Solve for x
   x = 4,412,513,115.56/30,874.50
6. Step 6: Final answer
   x = 142,917.72