Finding the Fourth Proportional to 52,131.79, 71,940.72 and 28,257.85

Step by Step Solution

1. Step 1: Write the proportion equation
   52,131.79 : 71,940.72 = 28,257.85 : x
2. Step 2: Convert to fraction form
   52,131.79/71,940.72 = 28,257.85/x
3. Step 3: Cross multiply
   52,131.79x = 71,940.72 × 28,257.85
4. Step 4: Simplify right side
   52,131.79x = 2,032,890,074.65
5. Step 5: Solve for x
   x = 2,032,890,074.65/52,131.79
6. Step 6: Final answer
   x = 38,995.21