Finding the Fourth Proportional to 143,338.71, 197,790.24 and 78,797.31

Step by Step Solution

1. Step 1: Write the proportion equation
   143,338.71 : 197,790.24 = 78,797.31 : x
2. Step 2: Convert to fraction form
   143,338.71/197,790.24 = 78,797.31/x
3. Step 3: Cross multiply
   143,338.71x = 197,790.24 × 78,797.31
4. Step 4: Simplify right side
   143,338.71x = 15,585,338,856.25
5. Step 5: Solve for x
   x = 15,585,338,856.25/143,338.71
6. Step 6: Final answer
   x = 108,730.84