Finding the Third Proportional to 642,894 and 875,651.25

Step by Step Solution

1. Step 1: Write the proportion equation
   642,894 : 875,651.25 = 875,651.25 : x
2. Step 2: Convert to fraction form
   642,894/875,651.25 = 875,651.25/x
3. Step 3: Cross multiply
   642,894x = 875,651.25 × 875,651.25
4. Step 4: Simplify right side
   642,894x = 766,765,111,626.56
5. Step 5: Solve for x
   x = 766,765,111,626.56/642,894
6. Step 6: Final answer
   x = 1,192,677.35