Finding the Third Proportional to 447,687 and 921,617.25

Step by Step Solution

1. Step 1: Write the proportion equation
   447,687 : 921,617.25 = 921,617.25 : x
2. Step 2: Convert to fraction form
   447,687/921,617.25 = 921,617.25/x
3. Step 3: Cross multiply
   447,687x = 921,617.25 × 921,617.25
4. Step 4: Simplify right side
   447,687x = 849,378,355,497.56
5. Step 5: Solve for x
   x = 849,378,355,497.56/447,687
6. Step 6: Final answer
   x = 1,897,259.37