Finding the Third Proportional to 273,138 and 557,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   273,138 : 557,116.50 = 557,116.50 : x
2. Step 2: Convert to fraction form
   273,138/557,116.50 = 557,116.50/x
3. Step 3: Cross multiply
   273,138x = 557,116.50 × 557,116.50
4. Step 4: Simplify right side
   273,138x = 310,378,794,572.25
5. Step 5: Solve for x
   x = 310,378,794,572.25/273,138
6. Step 6: Final answer
   x = 1,136,344.25