Finding the Third Proportional to 840,340 and 1,224,400

Step by Step Solution

1. Step 1: Write the proportion equation
   840,340 : 1,224,400 = 1,224,400 : x
2. Step 2: Convert to fraction form
   840,340/1,224,400 = 1,224,400/x
3. Step 3: Cross multiply
   840,340x = 1,224,400 × 1,224,400
4. Step 4: Simplify right side
   840,340x = 1,499,155,360,000
5. Step 5: Solve for x
   x = 1,499,155,360,000/840,340
6. Step 6: Final answer
   x = 1,783,986.67