Finding the Fourth Proportional to 143,007.20, 197,378.72 and 82,587.68

Step by Step Solution

1. Step 1: Write the proportion equation
   143,007.20 : 197,378.72 = 82,587.68 : x
2. Step 2: Convert to fraction form
   143,007.20/197,378.72 = 82,587.68/x
3. Step 3: Cross multiply
   143,007.20x = 197,378.72 × 82,587.68
4. Step 4: Simplify right side
   143,007.20x = 16,301,050,566.17
5. Step 5: Solve for x
   x = 16,301,050,566.17/143,007.20
6. Step 6: Final answer
   x = 113,987.62