Finding the Fourth Proportional to 143,834.56, 215,602.12 and 80,561.92

Step by Step Solution

1. Step 1: Write the proportion equation
   143,834.56 : 215,602.12 = 80,561.92 : x
2. Step 2: Convert to fraction form
   143,834.56/215,602.12 = 80,561.92/x
3. Step 3: Cross multiply
   143,834.56x = 215,602.12 × 80,561.92
4. Step 4: Simplify right side
   143,834.56x = 17,369,320,743.27
5. Step 5: Solve for x
   x = 17,369,320,743.27/143,834.56
6. Step 6: Final answer
   x = 120,759.02