Finding the Third Proportional to 435,490 and 666,196

Step by Step Solution

1. Step 1: Write the proportion equation
   435,490 : 666,196 = 666,196 : x
2. Step 2: Convert to fraction form
   435,490/666,196 = 666,196/x
3. Step 3: Cross multiply
   435,490x = 666,196 × 666,196
4. Step 4: Simplify right side
   435,490x = 443,817,110,416
5. Step 5: Solve for x
   x = 443,817,110,416/435,490
6. Step 6: Final answer
   x = 1,019,121.24