Finding the Third Proportional to 642,892.50 and 875,649

Step by Step Solution

1. Step 1: Write the proportion equation
   642,892.50 : 875,649 = 875,649 : x
2. Step 2: Convert to fraction form
   642,892.50/875,649 = 875,649/x
3. Step 3: Cross multiply
   642,892.50x = 875,649 × 875,649
4. Step 4: Simplify right side
   642,892.50x = 766,761,171,201
5. Step 5: Solve for x
   x = 766,761,171,201/642,892.50
6. Step 6: Final answer
   x = 1,192,674.00