Finding the Fourth Proportional to 143,667.42, 198,214.47 and 79,992.78

Step by Step Solution

1. Step 1: Write the proportion equation
   143,667.42 : 198,214.47 = 79,992.78 : x
2. Step 2: Convert to fraction form
   143,667.42/198,214.47 = 79,992.78/x
3. Step 3: Cross multiply
   143,667.42x = 198,214.47 × 79,992.78
4. Step 4: Simplify right side
   143,667.42x = 15,855,726,491.53
5. Step 5: Solve for x
   x = 15,855,726,491.53/143,667.42
6. Step 6: Final answer
   x = 110,364.11