Finding the Fourth Proportional to 123,404.26, 170,299.53 and 74,992.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,404.26 : 170,299.53 = 74,992.42 : x
2. Step 2: Convert to fraction form
   123,404.26/170,299.53 = 74,992.42/x
3. Step 3: Cross multiply
   123,404.26x = 170,299.53 × 74,992.42
4. Step 4: Simplify right side
   123,404.26x = 12,771,173,879.56
5. Step 5: Solve for x
   x = 12,771,173,879.56/123,404.26
6. Step 6: Final answer
   x = 103,490.54