Finding the Fourth Proportional to 142,671.20, 196,890.53 and 79,007.63

Step by Step Solution

1. Step 1: Write the proportion equation
   142,671.20 : 196,890.53 = 79,007.63 : x
2. Step 2: Convert to fraction form
   142,671.20/196,890.53 = 79,007.63/x
3. Step 3: Cross multiply
   142,671.20x = 196,890.53 × 79,007.63
4. Step 4: Simplify right side
   142,671.20x = 15,555,852,765.25
5. Step 5: Solve for x
   x = 15,555,852,765.25/142,671.20
6. Step 6: Final answer
   x = 109,032.89