Finding the Third Proportional to 143,543 and 309,023

Step by Step Solution

1. Step 1: Write the proportion equation
   143,543 : 309,023 = 309,023 : x
2. Step 2: Convert to fraction form
   143,543/309,023 = 309,023/x
3. Step 3: Cross multiply
   143,543x = 309,023 × 309,023
4. Step 4: Simplify right side
   143,543x = 95,495,214,529
5. Step 5: Solve for x
   x = 95,495,214,529/143,543
6. Step 6: Final answer
   x = 665,272.53