Finding the Third Proportional to 420,018 and 921,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,018 : 921,685.50 = 921,685.50 : x
2. Step 2: Convert to fraction form
   420,018/921,685.50 = 921,685.50/x
3. Step 3: Cross multiply
   420,018x = 921,685.50 × 921,685.50
4. Step 4: Simplify right side
   420,018x = 849,504,160,910.25
5. Step 5: Solve for x
   x = 849,504,160,910.25/420,018
6. Step 6: Final answer
   x = 2,022,542.27