Finding the Fourth Proportional to 51,353.52, 70,860.81 and 28,689.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,353.52 : 70,860.81 = 28,689.72 : x
2. Step 2: Convert to fraction form
   51,353.52/70,860.81 = 28,689.72/x
3. Step 3: Cross multiply
   51,353.52x = 70,860.81 × 28,689.72
4. Step 4: Simplify right side
   51,353.52x = 2,032,976,797.87
5. Step 5: Solve for x
   x = 2,032,976,797.87/51,353.52
6. Step 6: Final answer
   x = 39,587.88