Finding the Third Proportional to 812,800 and 1,786,488

Step by Step Solution

1. Step 1: Write the proportion equation
   812,800 : 1,786,488 = 1,786,488 : x
2. Step 2: Convert to fraction form
   812,800/1,786,488 = 1,786,488/x
3. Step 3: Cross multiply
   812,800x = 1,786,488 × 1,786,488
4. Step 4: Simplify right side
   812,800x = 3,191,539,374,144
5. Step 5: Solve for x
   x = 3,191,539,374,144/812,800
6. Step 6: Final answer
   x = 3,926,598.64