Finding the Third Proportional to 273,156 and 557,145.75

Step by Step Solution

1. Step 1: Write the proportion equation
   273,156 : 557,145.75 = 557,145.75 : x
2. Step 2: Convert to fraction form
   273,156/557,145.75 = 557,145.75/x
3. Step 3: Cross multiply
   273,156x = 557,145.75 × 557,145.75
4. Step 4: Simplify right side
   273,156x = 310,411,386,743.06
5. Step 5: Solve for x
   x = 310,411,386,743.06/273,156
6. Step 6: Final answer
   x = 1,136,388.68