Finding the Third Proportional to 142,879.50 and 305,442

Step by Step Solution

1. Step 1: Write the proportion equation
   142,879.50 : 305,442 = 305,442 : x
2. Step 2: Convert to fraction form
   142,879.50/305,442 = 305,442/x
3. Step 3: Cross multiply
   142,879.50x = 305,442 × 305,442
4. Step 4: Simplify right side
   142,879.50x = 93,294,815,364
5. Step 5: Solve for x
   x = 93,294,815,364/142,879.50
6. Step 6: Final answer
   x = 652,961.52