Finding the Fourth Proportional to 142,791.80, 197,061.86 and 79,133.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,791.80 : 197,061.86 = 79,133.69 : x
2. Step 2: Convert to fraction form
   142,791.80/197,061.86 = 79,133.69/x
3. Step 3: Cross multiply
   142,791.80x = 197,061.86 × 79,133.69
4. Step 4: Simplify right side
   142,791.80x = 15,594,232,830.55
5. Step 5: Solve for x
   x = 15,594,232,830.55/142,791.80
6. Step 6: Final answer
   x = 109,209.59