Finding the Fourth Proportional to 142,648.59, 196,854.71 and 82,218.75

Step by Step Solution

1. Step 1: Write the proportion equation
   142,648.59 : 196,854.71 = 82,218.75 : x
2. Step 2: Convert to fraction form
   142,648.59/196,854.71 = 82,218.75/x
3. Step 3: Cross multiply
   142,648.59x = 196,854.71 × 82,218.75
4. Step 4: Simplify right side
   142,648.59x = 16,185,147,038.51
5. Step 5: Solve for x
   x = 16,185,147,038.51/142,648.59
6. Step 6: Final answer
   x = 113,461.67