Finding the Fourth Proportional to 91,766.91, 137,689.25 and 50,165.31

Step by Step Solution

1. Step 1: Write the proportion equation
   91,766.91 : 137,689.25 = 50,165.31 : x
2. Step 2: Convert to fraction form
   91,766.91/137,689.25 = 50,165.31/x
3. Step 3: Cross multiply
   91,766.91x = 137,689.25 × 50,165.31
4. Step 4: Simplify right side
   91,766.91x = 6,907,223,659.09
5. Step 5: Solve for x
   x = 6,907,223,659.09/91,766.91
6. Step 6: Final answer
   x = 75,269.22