Finding the Fourth Proportional to 142,784.35, 197,043.57 and 79,123.21

Step by Step Solution

1. Step 1: Write the proportion equation
   142,784.35 : 197,043.57 = 79,123.21 : x
2. Step 2: Convert to fraction form
   142,784.35/197,043.57 = 79,123.21/x
3. Step 3: Cross multiply
   142,784.35x = 197,043.57 × 79,123.21
4. Step 4: Simplify right side
   142,784.35x = 15,590,718,783.04
5. Step 5: Solve for x
   x = 15,590,718,783.04/142,784.35
6. Step 6: Final answer
   x = 109,190.67