Finding the Third Proportional to 812,216 and 1,786,432

Step by Step Solution

1. Step 1: Write the proportion equation
   812,216 : 1,786,432 = 1,786,432 : x
2. Step 2: Convert to fraction form
   812,216/1,786,432 = 1,786,432/x
3. Step 3: Cross multiply
   812,216x = 1,786,432 × 1,786,432
4. Step 4: Simplify right side
   812,216x = 3,191,339,290,624
5. Step 5: Solve for x
   x = 3,191,339,290,624/812,216
6. Step 6: Final answer
   x = 3,929,175.60