Finding the Fourth Proportional to 142,580.71, 196,782.11 and 82,139.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,580.71 : 196,782.11 = 82,139.59 : x
2. Step 2: Convert to fraction form
   142,580.71/196,782.11 = 82,139.59/x
3. Step 3: Cross multiply
   142,580.71x = 196,782.11 × 82,139.59
4. Step 4: Simplify right side
   142,580.71x = 16,163,601,834.73
5. Step 5: Solve for x
   x = 16,163,601,834.73/142,580.71
6. Step 6: Final answer
   x = 113,364.58