Finding the Fourth Proportional to 143,682.89, 198,274.59 and 79,139.57

Step by Step Solution

1. Step 1: Write the proportion equation
   143,682.89 : 198,274.59 = 79,139.57 : x
2. Step 2: Convert to fraction form
   143,682.89/198,274.59 = 79,139.57/x
3. Step 3: Cross multiply
   143,682.89x = 198,274.59 × 79,139.57
4. Step 4: Simplify right side
   143,682.89x = 15,691,364,803.15
5. Step 5: Solve for x
   x = 15,691,364,803.15/143,682.89
6. Step 6: Final answer
   x = 109,208.31