Finding the Fourth Proportional to 51,329.87, 70,830.61 and 28,665.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,329.87 : 70,830.61 = 28,665.72 : x
2. Step 2: Convert to fraction form
   51,329.87/70,830.61 = 28,665.72/x
3. Step 3: Cross multiply
   51,329.87x = 70,830.61 × 28,665.72
4. Step 4: Simplify right side
   51,329.87x = 2,030,410,079.54
5. Step 5: Solve for x
   x = 2,030,410,079.54/51,329.87
6. Step 6: Final answer
   x = 39,556.11