Finding the Third Proportional to 143,140 and 303,560

Step by Step Solution

1. Step 1: Write the proportion equation
   143,140 : 303,560 = 303,560 : x
2. Step 2: Convert to fraction form
   143,140/303,560 = 303,560/x
3. Step 3: Cross multiply
   143,140x = 303,560 × 303,560
4. Step 4: Simplify right side
   143,140x = 92,148,673,600
5. Step 5: Solve for x
   x = 92,148,673,600/143,140
6. Step 6: Final answer
   x = 643,766.06