Finding the Third Proportional to 620,424.56 and 854,359.31

Step by Step Solution

1. Step 1: Write the proportion equation
   620,424.56 : 854,359.31 = 854,359.31 : x
2. Step 2: Convert to fraction form
   620,424.56/854,359.31 = 854,359.31/x
3. Step 3: Cross multiply
   620,424.56x = 854,359.31 × 854,359.31
4. Step 4: Simplify right side
   620,424.56x = 729,929,834,855.47
5. Step 5: Solve for x
   x = 729,929,834,855.47/620,424.56
6. Step 6: Final answer
   x = 1,176,500.54