Finding the Third Proportional to 840,336 and 1,224,396

Step by Step Solution

1. Step 1: Write the proportion equation
   840,336 : 1,224,396 = 1,224,396 : x
2. Step 2: Convert to fraction form
   840,336/1,224,396 = 1,224,396/x
3. Step 3: Cross multiply
   840,336x = 1,224,396 × 1,224,396
4. Step 4: Simplify right side
   840,336x = 1,499,145,564,816
5. Step 5: Solve for x
   x = 1,499,145,564,816/840,336
6. Step 6: Final answer
   x = 1,783,983.51