Finding the Third Proportional to 397,404 and 866,196

Step by Step Solution

1. Step 1: Write the proportion equation
   397,404 : 866,196 = 866,196 : x
2. Step 2: Convert to fraction form
   397,404/866,196 = 866,196/x
3. Step 3: Cross multiply
   397,404x = 866,196 × 866,196
4. Step 4: Simplify right side
   397,404x = 750,295,510,416
5. Step 5: Solve for x
   x = 750,295,510,416/397,404
6. Step 6: Final answer
   x = 1,887,991.84