Finding the Third Proportional to 278,150 and 610,426

Step by Step Solution

1. Step 1: Write the proportion equation
   278,150 : 610,426 = 610,426 : x
2. Step 2: Convert to fraction form
   278,150/610,426 = 610,426/x
3. Step 3: Cross multiply
   278,150x = 610,426 × 610,426
4. Step 4: Simplify right side
   278,150x = 372,619,901,476
5. Step 5: Solve for x
   x = 372,619,901,476/278,150
6. Step 6: Final answer
   x = 1,339,636.53