Finding the Third Proportional to 273,048.50 and 427,400

Step by Step Solution

1. Step 1: Write the proportion equation
   273,048.50 : 427,400 = 427,400 : x
2. Step 2: Convert to fraction form
   273,048.50/427,400 = 427,400/x
3. Step 3: Cross multiply
   273,048.50x = 427,400 × 427,400
4. Step 4: Simplify right side
   273,048.50x = 182,670,760,000
5. Step 5: Solve for x
   x = 182,670,760,000/273,048.50
6. Step 6: Final answer
   x = 669,004.81