Finding the Third Proportional to 447,687 and 921,616.50

Step by Step Solution

1. Step 1: Write the proportion equation
   447,687 : 921,616.50 = 921,616.50 : x
2. Step 2: Convert to fraction form
   447,687/921,616.50 = 921,616.50/x
3. Step 3: Cross multiply
   447,687x = 921,616.50 × 921,616.50
4. Step 4: Simplify right side
   447,687x = 849,376,973,072.25
5. Step 5: Solve for x
   x = 849,376,973,072.25/447,687
6. Step 6: Final answer
   x = 1,897,256.28