Finding the Fourth Proportional to 142,748.52, 196,990.38 and 79,086.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,748.52 : 196,990.38 = 79,086.12 : x
2. Step 2: Convert to fraction form
   142,748.52/196,990.38 = 79,086.12/x
3. Step 3: Cross multiply
   142,748.52x = 196,990.38 × 79,086.12
4. Step 4: Simplify right side
   142,748.52x = 15,579,204,831.53
5. Step 5: Solve for x
   x = 15,579,204,831.53/142,748.52
6. Step 6: Final answer
   x = 109,137.42