Finding the Fourth Proportional to 136,408.72, 188,253.49 and 82,696

Step by Step Solution

1. Step 1: Write the proportion equation
   136,408.72 : 188,253.49 = 82,696 : x
2. Step 2: Convert to fraction form
   136,408.72/188,253.49 = 82,696/x
3. Step 3: Cross multiply
   136,408.72x = 188,253.49 × 82,696
4. Step 4: Simplify right side
   136,408.72x = 15,567,810,609.04
5. Step 5: Solve for x
   x = 15,567,810,609.04/136,408.72
6. Step 6: Final answer
   x = 114,126.21