Finding the Third Proportional to 217,661 and 455,002

Step by Step Solution

1. Step 1: Write the proportion equation
   217,661 : 455,002 = 455,002 : x
2. Step 2: Convert to fraction form
   217,661/455,002 = 455,002/x
3. Step 3: Cross multiply
   217,661x = 455,002 × 455,002
4. Step 4: Simplify right side
   217,661x = 207,026,820,004
5. Step 5: Solve for x
   x = 207,026,820,004/217,661
6. Step 6: Final answer
   x = 951,143.38