Finding the Third Proportional to 389,064 and 916,020

Step by Step Solution

1. Step 1: Write the proportion equation
   389,064 : 916,020 = 916,020 : x
2. Step 2: Convert to fraction form
   389,064/916,020 = 916,020/x
3. Step 3: Cross multiply
   389,064x = 916,020 × 916,020
4. Step 4: Simplify right side
   389,064x = 839,092,640,400
5. Step 5: Solve for x
   x = 839,092,640,400/389,064
6. Step 6: Final answer
   x = 2,156,695.66