Finding the Third Proportional to 217,280 and 454,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   217,280 : 454,415.50 = 454,415.50 : x
2. Step 2: Convert to fraction form
   217,280/454,415.50 = 454,415.50/x
3. Step 3: Cross multiply
   217,280x = 454,415.50 × 454,415.50
4. Step 4: Simplify right side
   217,280x = 206,493,446,640.25
5. Step 5: Solve for x
   x = 206,493,446,640.25/217,280
6. Step 6: Final answer
   x = 950,356.44