Finding the Fourth Proportional to 50,211.09, 69,290.71 and 28,989.90

Step by Step Solution

1. Step 1: Write the proportion equation
   50,211.09 : 69,290.71 = 28,989.90 : x
2. Step 2: Convert to fraction form
   50,211.09/69,290.71 = 28,989.90/x
3. Step 3: Cross multiply
   50,211.09x = 69,290.71 × 28,989.90
4. Step 4: Simplify right side
   50,211.09x = 2,008,730,753.83
5. Step 5: Solve for x
   x = 2,008,730,753.83/50,211.09
6. Step 6: Final answer
   x = 40,005.72