Finding the Fourth Proportional to 51,156, 70,596.72 and 28,800

Step by Step Solution

1. Step 1: Write the proportion equation
   51,156 : 70,596.72 = 28,800 : x
2. Step 2: Convert to fraction form
   51,156/70,596.72 = 28,800/x
3. Step 3: Cross multiply
   51,156x = 70,596.72 × 28,800
4. Step 4: Simplify right side
   51,156x = 2,033,185,536
5. Step 5: Solve for x
   x = 2,033,185,536/51,156
6. Step 6: Final answer
   x = 39,744.81