Finding the Third Proportional to 431,868 and 891,397.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,868 : 891,397.50 = 891,397.50 : x
2. Step 2: Convert to fraction form
   431,868/891,397.50 = 891,397.50/x
3. Step 3: Cross multiply
   431,868x = 891,397.50 × 891,397.50
4. Step 4: Simplify right side
   431,868x = 794,589,503,006.25
5. Step 5: Solve for x
   x = 794,589,503,006.25/431,868
6. Step 6: Final answer
   x = 1,839,889.74