Finding the Fourth Proportional to 103,417.56, 155,137.68 and 82,357.56

Step by Step Solution

1. Step 1: Write the proportion equation
   103,417.56 : 155,137.68 = 82,357.56 : x
2. Step 2: Convert to fraction form
   103,417.56/155,137.68 = 82,357.56/x
3. Step 3: Cross multiply
   103,417.56x = 155,137.68 × 82,357.56
4. Step 4: Simplify right side
   103,417.56x = 12,776,760,788.86
5. Step 5: Solve for x
   x = 12,776,760,788.86/103,417.56
6. Step 6: Final answer
   x = 123,545.37