Finding the Third Proportional to 812,728 and 1,869,166

Step by Step Solution

1. Step 1: Write the proportion equation
   812,728 : 1,869,166 = 1,869,166 : x
2. Step 2: Convert to fraction form
   812,728/1,869,166 = 1,869,166/x
3. Step 3: Cross multiply
   812,728x = 1,869,166 × 1,869,166
4. Step 4: Simplify right side
   812,728x = 3,493,781,535,556
5. Step 5: Solve for x
   x = 3,493,781,535,556/812,728
6. Step 6: Final answer
   x = 4,298,832.49