Finding the Third Proportional to 142,053.75 and 315,639

Step by Step Solution

1. Step 1: Write the proportion equation
   142,053.75 : 315,639 = 315,639 : x
2. Step 2: Convert to fraction form
   142,053.75/315,639 = 315,639/x
3. Step 3: Cross multiply
   142,053.75x = 315,639 × 315,639
4. Step 4: Simplify right side
   142,053.75x = 99,627,978,321
5. Step 5: Solve for x
   x = 99,627,978,321/142,053.75
6. Step 6: Final answer
   x = 701,340.01