Finding the Third Proportional to 869,780 and 1,224,838

Step by Step Solution

1. Step 1: Write the proportion equation
   869,780 : 1,224,838 = 1,224,838 : x
2. Step 2: Convert to fraction form
   869,780/1,224,838 = 1,224,838/x
3. Step 3: Cross multiply
   869,780x = 1,224,838 × 1,224,838
4. Step 4: Simplify right side
   869,780x = 1,500,228,126,244
5. Step 5: Solve for x
   x = 1,500,228,126,244/869,780
6. Step 6: Final answer
   x = 1,724,836.31