Finding the Third Proportional to 647,410 and 1,388,132

Step by Step Solution

1. Step 1: Write the proportion equation
   647,410 : 1,388,132 = 1,388,132 : x
2. Step 2: Convert to fraction form
   647,410/1,388,132 = 1,388,132/x
3. Step 3: Cross multiply
   647,410x = 1,388,132 × 1,388,132
4. Step 4: Simplify right side
   647,410x = 1,926,910,449,424
5. Step 5: Solve for x
   x = 1,926,910,449,424/647,410
6. Step 6: Final answer
   x = 2,976,337.17