Finding the Third Proportional to 142,663.78 and 301,240.27

Step by Step Solution

1. Step 1: Write the proportion equation
   142,663.78 : 301,240.27 = 301,240.27 : x
2. Step 2: Convert to fraction form
   142,663.78/301,240.27 = 301,240.27/x
3. Step 3: Cross multiply
   142,663.78x = 301,240.27 × 301,240.27
4. Step 4: Simplify right side
   142,663.78x = 90,745,697,633.82
5. Step 5: Solve for x
   x = 90,745,697,633.82/142,663.78
6. Step 6: Final answer
   x = 636,080.84