Finding the Third Proportional to 143,514 and 313,258.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,514 : 313,258.50 = 313,258.50 : x
2. Step 2: Convert to fraction form
   143,514/313,258.50 = 313,258.50/x
3. Step 3: Cross multiply
   143,514x = 313,258.50 × 313,258.50
4. Step 4: Simplify right side
   143,514x = 98,130,887,822.25
5. Step 5: Solve for x
   x = 98,130,887,822.25/143,514
6. Step 6: Final answer
   x = 683,772.23