Finding the Third Proportional to 217,126 and 478,426

Step by Step Solution

1. Step 1: Write the proportion equation
   217,126 : 478,426 = 478,426 : x
2. Step 2: Convert to fraction form
   217,126/478,426 = 478,426/x
3. Step 3: Cross multiply
   217,126x = 478,426 × 478,426
4. Step 4: Simplify right side
   217,126x = 228,891,437,476
5. Step 5: Solve for x
   x = 228,891,437,476/217,126
6. Step 6: Final answer
   x = 1,054,187.14