Finding the Third Proportional to 776,120 and 1,665,640

Step by Step Solution

1. Step 1: Write the proportion equation
   776,120 : 1,665,640 = 1,665,640 : x
2. Step 2: Convert to fraction form
   776,120/1,665,640 = 1,665,640/x
3. Step 3: Cross multiply
   776,120x = 1,665,640 × 1,665,640
4. Step 4: Simplify right side
   776,120x = 2,774,356,609,600
5. Step 5: Solve for x
   x = 2,774,356,609,600/776,120
6. Step 6: Final answer
   x = 3,574,649.04