Finding the Fourth Proportional to 142,606, 196,848.12 and 82,990

Step by Step Solution

1. Step 1: Write the proportion equation
   142,606 : 196,848.12 = 82,990 : x
2. Step 2: Convert to fraction form
   142,606/196,848.12 = 82,990/x
3. Step 3: Cross multiply
   142,606x = 196,848.12 × 82,990
4. Step 4: Simplify right side
   142,606x = 16,336,425,478.80
5. Step 5: Solve for x
   x = 16,336,425,478.80/142,606
6. Step 6: Final answer
   x = 114,556.37