Finding the Third Proportional to 142,878.50 and 307,263

Step by Step Solution

1. Step 1: Write the proportion equation
   142,878.50 : 307,263 = 307,263 : x
2. Step 2: Convert to fraction form
   142,878.50/307,263 = 307,263/x
3. Step 3: Cross multiply
   142,878.50x = 307,263 × 307,263
4. Step 4: Simplify right side
   142,878.50x = 94,410,551,169
5. Step 5: Solve for x
   x = 94,410,551,169/142,878.50
6. Step 6: Final answer
   x = 660,775.07