Finding the Third Proportional to 142,438.50 and 300,884.63

Step by Step Solution

1. Step 1: Write the proportion equation
   142,438.50 : 300,884.63 = 300,884.63 : x
2. Step 2: Convert to fraction form
   142,438.50/300,884.63 = 300,884.63/x
3. Step 3: Cross multiply
   142,438.50x = 300,884.63 × 300,884.63
4. Step 4: Simplify right side
   142,438.50x = 90,531,557,561.39
5. Step 5: Solve for x
   x = 90,531,557,561.39/142,438.50
6. Step 6: Final answer
   x = 635,583.48