Finding the Fourth Proportional to 142,427.09, 196,598.83 and 82,021.80

Step by Step Solution

1. Step 1: Write the proportion equation
   142,427.09 : 196,598.83 = 82,021.80 : x
2. Step 2: Convert to fraction form
   142,427.09/196,598.83 = 82,021.80/x
3. Step 3: Cross multiply
   142,427.09x = 196,598.83 × 82,021.80
4. Step 4: Simplify right side
   142,427.09x = 16,125,389,494.61
5. Step 5: Solve for x
   x = 16,125,389,494.61/142,427.09
6. Step 6: Final answer
   x = 113,218.55