Finding the Third Proportional to 420,662 and 912,300

Step by Step Solution

1. Step 1: Write the proportion equation
   420,662 : 912,300 = 912,300 : x
2. Step 2: Convert to fraction form
   420,662/912,300 = 912,300/x
3. Step 3: Cross multiply
   420,662x = 912,300 × 912,300
4. Step 4: Simplify right side
   420,662x = 832,291,290,000
5. Step 5: Solve for x
   x = 832,291,290,000/420,662
6. Step 6: Final answer
   x = 1,978,527.39