Finding the Third Proportional to 635,806 and 891,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   635,806 : 891,212.50 = 891,212.50 : x
2. Step 2: Convert to fraction form
   635,806/891,212.50 = 891,212.50/x
3. Step 3: Cross multiply
   635,806x = 891,212.50 × 891,212.50
4. Step 4: Simplify right side
   635,806x = 794,259,720,156.25
5. Step 5: Solve for x
   x = 794,259,720,156.25/635,806
6. Step 6: Final answer
   x = 1,249,217.09