Finding the Fourth Proportional to 143,086.37, 197,449.30 and 79,419.15

Step by Step Solution

1. Step 1: Write the proportion equation
   143,086.37 : 197,449.30 = 79,419.15 : x
2. Step 2: Convert to fraction form
   143,086.37/197,449.30 = 79,419.15/x
3. Step 3: Cross multiply
   143,086.37x = 197,449.30 × 79,419.15
4. Step 4: Simplify right side
   143,086.37x = 15,681,255,574.10
5. Step 5: Solve for x
   x = 15,681,255,574.10/143,086.37
6. Step 6: Final answer
   x = 109,592.94