Finding the Third Proportional to 639,798 and 1,368,156

Step by Step Solution

1. Step 1: Write the proportion equation
   639,798 : 1,368,156 = 1,368,156 : x
2. Step 2: Convert to fraction form
   639,798/1,368,156 = 1,368,156/x
3. Step 3: Cross multiply
   639,798x = 1,368,156 × 1,368,156
4. Step 4: Simplify right side
   639,798x = 1,871,850,840,336
5. Step 5: Solve for x
   x = 1,871,850,840,336/639,798
6. Step 6: Final answer
   x = 2,925,690.36