Finding the Third Proportional to 217,127.25 and 478,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   217,127.25 : 478,426.50 = 478,426.50 : x
2. Step 2: Convert to fraction form
   217,127.25/478,426.50 = 478,426.50/x
3. Step 3: Cross multiply
   217,127.25x = 478,426.50 × 478,426.50
4. Step 4: Simplify right side
   217,127.25x = 228,891,915,902.25
5. Step 5: Solve for x
   x = 228,891,915,902.25/217,127.25
6. Step 6: Final answer
   x = 1,054,183.28