Finding the Third Proportional to 1,287,224 and 2,776,792

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,224 : 2,776,792 = 2,776,792 : x
2. Step 2: Convert to fraction form
   1,287,224/2,776,792 = 2,776,792/x
3. Step 3: Cross multiply
   1,287,224x = 2,776,792 × 2,776,792
4. Step 4: Simplify right side
   1,287,224x = 7,710,573,811,264
5. Step 5: Solve for x
   x = 7,710,573,811,264/1,287,224
6. Step 6: Final answer
   x = 5,990,079.28