Finding the Fourth Proportional to 90,391.82, 124,727.61 and 50,105.57

Step by Step Solution

1. Step 1: Write the proportion equation
   90,391.82 : 124,727.61 = 50,105.57 : x
2. Step 2: Convert to fraction form
   90,391.82/124,727.61 = 50,105.57/x
3. Step 3: Cross multiply
   90,391.82x = 124,727.61 × 50,105.57
4. Step 4: Simplify right side
   90,391.82x = 6,249,547,119.62
5. Step 5: Solve for x
   x = 6,249,547,119.62/90,391.82
6. Step 6: Final answer
   x = 69,138.42