Finding the Third Proportional to 420,700 and 900,510

Step by Step Solution

1. Step 1: Write the proportion equation
   420,700 : 900,510 = 900,510 : x
2. Step 2: Convert to fraction form
   420,700/900,510 = 900,510/x
3. Step 3: Cross multiply
   420,700x = 900,510 × 900,510
4. Step 4: Simplify right side
   420,700x = 810,918,260,100
5. Step 5: Solve for x
   x = 810,918,260,100/420,700
6. Step 6: Final answer
   x = 1,927,545.19