Finding the Third Proportional to 388,914 and 831,776

Step by Step Solution

1. Step 1: Write the proportion equation
   388,914 : 831,776 = 831,776 : x
2. Step 2: Convert to fraction form
   388,914/831,776 = 831,776/x
3. Step 3: Cross multiply
   388,914x = 831,776 × 831,776
4. Step 4: Simplify right side
   388,914x = 691,851,314,176
5. Step 5: Solve for x
   x = 691,851,314,176/388,914
6. Step 6: Final answer
   x = 1,778,931.37