Finding the Third Proportional to 431,867 and 891,395.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,867 : 891,395.50 = 891,395.50 : x
2. Step 2: Convert to fraction form
   431,867/891,395.50 = 891,395.50/x
3. Step 3: Cross multiply
   431,867x = 891,395.50 × 891,395.50
4. Step 4: Simplify right side
   431,867x = 794,585,937,420.25
5. Step 5: Solve for x
   x = 794,585,937,420.25/431,867
6. Step 6: Final answer
   x = 1,839,885.75