Finding the Third Proportional to 142,303.50 and 300,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,303.50 : 300,280.50 = 300,280.50 : x
2. Step 2: Convert to fraction form
   142,303.50/300,280.50 = 300,280.50/x
3. Step 3: Cross multiply
   142,303.50x = 300,280.50 × 300,280.50
4. Step 4: Simplify right side
   142,303.50x = 90,168,378,680.25
5. Step 5: Solve for x
   x = 90,168,378,680.25/142,303.50
6. Step 6: Final answer
   x = 633,634.30