Finding the Third Proportional to 1,266,480 and 2,688,408

Step by Step Solution

1. Step 1: Write the proportion equation
   1,266,480 : 2,688,408 = 2,688,408 : x
2. Step 2: Convert to fraction form
   1,266,480/2,688,408 = 2,688,408/x
3. Step 3: Cross multiply
   1,266,480x = 2,688,408 × 2,688,408
4. Step 4: Simplify right side
   1,266,480x = 7,227,537,574,464
5. Step 5: Solve for x
   x = 7,227,537,574,464/1,266,480
6. Step 6: Final answer
   x = 5,706,791.72