Finding the Third Proportional to 639,262 and 1,378,154

Step by Step Solution

1. Step 1: Write the proportion equation
   639,262 : 1,378,154 = 1,378,154 : x
2. Step 2: Convert to fraction form
   639,262/1,378,154 = 1,378,154/x
3. Step 3: Cross multiply
   639,262x = 1,378,154 × 1,378,154
4. Step 4: Simplify right side
   639,262x = 1,899,308,447,716
5. Step 5: Solve for x
   x = 1,899,308,447,716/639,262
6. Step 6: Final answer
   x = 2,971,095.49