Finding the Third Proportional to 642,769 and 1,335,360

Step by Step Solution

1. Step 1: Write the proportion equation
   642,769 : 1,335,360 = 1,335,360 : x
2. Step 2: Convert to fraction form
   642,769/1,335,360 = 1,335,360/x
3. Step 3: Cross multiply
   642,769x = 1,335,360 × 1,335,360
4. Step 4: Simplify right side
   642,769x = 1,783,186,329,600
5. Step 5: Solve for x
   x = 1,783,186,329,600/642,769
6. Step 6: Final answer
   x = 2,774,225.78