Finding the Fourth Proportional to 143,412.72, 214,774.56 and 80,077.20

Step by Step Solution

1. Step 1: Write the proportion equation
   143,412.72 : 214,774.56 = 80,077.20 : x
2. Step 2: Convert to fraction form
   143,412.72/214,774.56 = 80,077.20/x
3. Step 3: Cross multiply
   143,412.72x = 214,774.56 × 80,077.20
4. Step 4: Simplify right side
   143,412.72x = 17,198,545,396.03
5. Step 5: Solve for x
   x = 17,198,545,396.03/143,412.72
6. Step 6: Final answer
   x = 119,923.43