Finding the Third Proportional to 217,858.50 and 455,670

Step by Step Solution

1. Step 1: Write the proportion equation
   217,858.50 : 455,670 = 455,670 : x
2. Step 2: Convert to fraction form
   217,858.50/455,670 = 455,670/x
3. Step 3: Cross multiply
   217,858.50x = 455,670 × 455,670
4. Step 4: Simplify right side
   217,858.50x = 207,635,148,900
5. Step 5: Solve for x
   x = 207,635,148,900/217,858.50
6. Step 6: Final answer
   x = 953,073.43