Finding the Third Proportional to 342,474.75 and 542,268

Step by Step Solution

1. Step 1: Write the proportion equation
   342,474.75 : 542,268 = 542,268 : x
2. Step 2: Convert to fraction form
   342,474.75/542,268 = 542,268/x
3. Step 3: Cross multiply
   342,474.75x = 542,268 × 542,268
4. Step 4: Simplify right side
   342,474.75x = 294,054,583,824
5. Step 5: Solve for x
   x = 294,054,583,824/342,474.75
6. Step 6: Final answer
   x = 858,616.83