Finding the Fourth Proportional to 103,635.24, 155,277.90 and 82,815

Step by Step Solution

1. Step 1: Write the proportion equation
   103,635.24 : 155,277.90 = 82,815 : x
2. Step 2: Convert to fraction form
   103,635.24/155,277.90 = 82,815/x
3. Step 3: Cross multiply
   103,635.24x = 155,277.90 × 82,815
4. Step 4: Simplify right side
   103,635.24x = 12,859,339,288.50
5. Step 5: Solve for x
   x = 12,859,339,288.50/103,635.24
6. Step 6: Final answer
   x = 124,082.69