Finding the Third Proportional to 542,644 and 1,178,672

Step by Step Solution

1. Step 1: Write the proportion equation
   542,644 : 1,178,672 = 1,178,672 : x
2. Step 2: Convert to fraction form
   542,644/1,178,672 = 1,178,672/x
3. Step 3: Cross multiply
   542,644x = 1,178,672 × 1,178,672
4. Step 4: Simplify right side
   542,644x = 1,389,267,683,584
5. Step 5: Solve for x
   x = 1,389,267,683,584/542,644
6. Step 6: Final answer
   x = 2,560,182.52