Finding the Fourth Proportional to 123,301.91, 170,138.39 and 74,878.65

Step by Step Solution

1. Step 1: Write the proportion equation
   123,301.91 : 170,138.39 = 74,878.65 : x
2. Step 2: Convert to fraction form
   123,301.91/170,138.39 = 74,878.65/x
3. Step 3: Cross multiply
   123,301.91x = 170,138.39 × 74,878.65
4. Step 4: Simplify right side
   123,301.91x = 12,739,732,581.98
5. Step 5: Solve for x
   x = 12,739,732,581.98/123,301.91
6. Step 6: Final answer
   x = 103,321.46