Finding the Fourth Proportional to 51,511.76, 71,087.98 and 28,851.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,511.76 : 71,087.98 = 28,851.72 : x
2. Step 2: Convert to fraction form
   51,511.76/71,087.98 = 28,851.72/x
3. Step 3: Cross multiply
   51,511.76x = 71,087.98 × 28,851.72
4. Step 4: Simplify right side
   51,511.76x = 2,051,010,494.33
5. Step 5: Solve for x
   x = 2,051,010,494.33/51,511.76
6. Step 6: Final answer
   x = 39,816.35