Finding the Fourth Proportional to 142,570.67, 196,725.57 and 82,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,570.67 : 196,725.57 = 82,129.50 : x
2. Step 2: Convert to fraction form
   142,570.67/196,725.57 = 82,129.50/x
3. Step 3: Cross multiply
   142,570.67x = 196,725.57 × 82,129.50
4. Step 4: Simplify right side
   142,570.67x = 16,156,972,701.32
5. Step 5: Solve for x
   x = 16,156,972,701.32/142,570.67
6. Step 6: Final answer
   x = 113,326.07