Finding the Third Proportional to 420,111 and 921,856

Step by Step Solution

1. Step 1: Write the proportion equation
   420,111 : 921,856 = 921,856 : x
2. Step 2: Convert to fraction form
   420,111/921,856 = 921,856/x
3. Step 3: Cross multiply
   420,111x = 921,856 × 921,856
4. Step 4: Simplify right side
   420,111x = 849,818,484,736
5. Step 5: Solve for x
   x = 849,818,484,736/420,111
6. Step 6: Final answer
   x = 2,022,842.74