Finding the Third Proportional to 666,426 and 1,451,172

Step by Step Solution

1. Step 1: Write the proportion equation
   666,426 : 1,451,172 = 1,451,172 : x
2. Step 2: Convert to fraction form
   666,426/1,451,172 = 1,451,172/x
3. Step 3: Cross multiply
   666,426x = 1,451,172 × 1,451,172
4. Step 4: Simplify right side
   666,426x = 2,105,900,173,584
5. Step 5: Solve for x
   x = 2,105,900,173,584/666,426
6. Step 6: Final answer
   x = 3,159,991.02