Finding the Third Proportional to 143,293.50 and 307,719

Step by Step Solution

1. Step 1: Write the proportion equation
   143,293.50 : 307,719 = 307,719 : x
2. Step 2: Convert to fraction form
   143,293.50/307,719 = 307,719/x
3. Step 3: Cross multiply
   143,293.50x = 307,719 × 307,719
4. Step 4: Simplify right side
   143,293.50x = 94,690,982,961
5. Step 5: Solve for x
   x = 94,690,982,961/143,293.50
6. Step 6: Final answer
   x = 660,818.41