Finding the Fourth Proportional to 85,786.58, 128,827.49 and 82,096.02

Step by Step Solution

1. Step 1: Write the proportion equation
   85,786.58 : 128,827.49 = 82,096.02 : x
2. Step 2: Convert to fraction form
   85,786.58/128,827.49 = 82,096.02/x
3. Step 3: Cross multiply
   85,786.58x = 128,827.49 × 82,096.02
4. Step 4: Simplify right side
   85,786.58x = 10,576,223,785.11
5. Step 5: Solve for x
   x = 10,576,223,785.11/85,786.58
6. Step 6: Final answer
   x = 123,285.30