Finding the Third Proportional to 542,643 and 1,178,670

Step by Step Solution

1. Step 1: Write the proportion equation
   542,643 : 1,178,670 = 1,178,670 : x
2. Step 2: Convert to fraction form
   542,643/1,178,670 = 1,178,670/x
3. Step 3: Cross multiply
   542,643x = 1,178,670 × 1,178,670
4. Step 4: Simplify right side
   542,643x = 1,389,262,968,900
5. Step 5: Solve for x
   x = 1,389,262,968,900/542,643
6. Step 6: Final answer
   x = 2,560,178.55