Finding the Fourth Proportional to 143,023.10, 199,969.90 and 143,023.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,023.10 : 199,969.90 = 143,023.10 : x
2. Step 2: Convert to fraction form
   143,023.10/199,969.90 = 143,023.10/x
3. Step 3: Cross multiply
   143,023.10x = 199,969.90 × 143,023.10
4. Step 4: Simplify right side
   143,023.10x = 28,600,315,004.69
5. Step 5: Solve for x
   x = 28,600,315,004.69/143,023.10
6. Step 6: Final answer
   x = 199,969.90