Finding the Fourth Proportional to 51,587.55, 71,198.78 and 28,935.69

Step by Step Solution

1. Step 1: Write the proportion equation
   51,587.55 : 71,198.78 = 28,935.69 : x
2. Step 2: Convert to fraction form
   51,587.55/71,198.78 = 28,935.69/x
3. Step 3: Cross multiply
   51,587.55x = 71,198.78 × 28,935.69
4. Step 4: Simplify right side
   51,587.55x = 2,060,185,681.78
5. Step 5: Solve for x
   x = 2,060,185,681.78/51,587.55
6. Step 6: Final answer
   x = 39,935.71