Finding the Fourth Proportional to 142,947, 197,267.78 and 79,284.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,947 : 197,267.78 = 79,284.96 : x
2. Step 2: Convert to fraction form
   142,947/197,267.78 = 79,284.96/x
3. Step 3: Cross multiply
   142,947x = 197,267.78 × 79,284.96
4. Step 4: Simplify right side
   142,947x = 15,640,368,244.80
5. Step 5: Solve for x
   x = 15,640,368,244.80/142,947
6. Step 6: Final answer
   x = 109,413.76