Finding the Third Proportional to 1,638,960 and 3,576,792

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,960 : 3,576,792 = 3,576,792 : x
2. Step 2: Convert to fraction form
   1,638,960/3,576,792 = 3,576,792/x
3. Step 3: Cross multiply
   1,638,960x = 3,576,792 × 3,576,792
4. Step 4: Simplify right side
   1,638,960x = 12,793,441,011,264
5. Step 5: Solve for x
   x = 12,793,441,011,264/1,638,960
6. Step 6: Final answer
   x = 7,805,828.70