Finding the Fourth Proportional to 51,360.72, 70,872.72 and 28,697.88

Step by Step Solution

1. Step 1: Write the proportion equation
   51,360.72 : 70,872.72 = 28,697.88 : x
2. Step 2: Convert to fraction form
   51,360.72/70,872.72 = 28,697.88/x
3. Step 3: Cross multiply
   51,360.72x = 70,872.72 × 28,697.88
4. Step 4: Simplify right side
   51,360.72x = 2,033,896,813.83
5. Step 5: Solve for x
   x = 2,033,896,813.83/51,360.72
6. Step 6: Final answer
   x = 39,600.24