Finding the Fourth Proportional to 50,131.20, 69,176.72 and 28,912.08

Step by Step Solution

1. Step 1: Write the proportion equation
   50,131.20 : 69,176.72 = 28,912.08 : x
2. Step 2: Convert to fraction form
   50,131.20/69,176.72 = 28,912.08/x
3. Step 3: Cross multiply
   50,131.20x = 69,176.72 × 28,912.08
4. Step 4: Simplify right side
   50,131.20x = 2,000,042,862.78
5. Step 5: Solve for x
   x = 2,000,042,862.78/50,131.20
6. Step 6: Final answer
   x = 39,896.17