Finding the Third Proportional to 678,810 and 1,006,472

Step by Step Solution

1. Step 1: Write the proportion equation
   678,810 : 1,006,472 = 1,006,472 : x
2. Step 2: Convert to fraction form
   678,810/1,006,472 = 1,006,472/x
3. Step 3: Cross multiply
   678,810x = 1,006,472 × 1,006,472
4. Step 4: Simplify right side
   678,810x = 1,012,985,886,784
5. Step 5: Solve for x
   x = 1,012,985,886,784/678,810
6. Step 6: Final answer
   x = 1,492,296.65