Finding the Third Proportional to 423,018 and 866,668.50

Step by Step Solution

1. Step 1: Write the proportion equation
   423,018 : 866,668.50 = 866,668.50 : x
2. Step 2: Convert to fraction form
   423,018/866,668.50 = 866,668.50/x
3. Step 3: Cross multiply
   423,018x = 866,668.50 × 866,668.50
4. Step 4: Simplify right side
   423,018x = 751,114,288,892.25
5. Step 5: Solve for x
   x = 751,114,288,892.25/423,018
6. Step 6: Final answer
   x = 1,775,608.34