Finding the Fourth Proportional to 136,456.50, 204,458.47 and 82,986.75

Step by Step Solution

1. Step 1: Write the proportion equation
   136,456.50 : 204,458.47 = 82,986.75 : x
2. Step 2: Convert to fraction form
   136,456.50/204,458.47 = 82,986.75/x
3. Step 3: Cross multiply
   136,456.50x = 204,458.47 × 82,986.75
4. Step 4: Simplify right side
   136,456.50x = 16,967,342,498.05
5. Step 5: Solve for x
   x = 16,967,342,498.05/136,456.50
6. Step 6: Final answer
   x = 124,342.50