Finding the Third Proportional to 639,738 and 1,368,060

Step by Step Solution

1. Step 1: Write the proportion equation
   639,738 : 1,368,060 = 1,368,060 : x
2. Step 2: Convert to fraction form
   639,738/1,368,060 = 1,368,060/x
3. Step 3: Cross multiply
   639,738x = 1,368,060 × 1,368,060
4. Step 4: Simplify right side
   639,738x = 1,871,588,163,600
5. Step 5: Solve for x
   x = 1,871,588,163,600/639,738
6. Step 6: Final answer
   x = 2,925,554.15