Finding the Fourth Proportional to 143,136.10, 200,128.10 and 143,136.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,136.10 : 200,128.10 = 143,136.10 : x
2. Step 2: Convert to fraction form
   143,136.10/200,128.10 = 143,136.10/x
3. Step 3: Cross multiply
   143,136.10x = 200,128.10 × 143,136.10
4. Step 4: Simplify right side
   143,136.10x = 28,645,555,734.41
5. Step 5: Solve for x
   x = 28,645,555,734.41/143,136.10
6. Step 6: Final answer
   x = 200,128.10