Finding the Third Proportional to 212,988 and 454,393.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,988 : 454,393.50 = 454,393.50 : x
2. Step 2: Convert to fraction form
   212,988/454,393.50 = 454,393.50/x
3. Step 3: Cross multiply
   212,988x = 454,393.50 × 454,393.50
4. Step 4: Simplify right side
   212,988x = 206,473,452,842.25
5. Step 5: Solve for x
   x = 206,473,452,842.25/212,988
6. Step 6: Final answer
   x = 969,413.55