Finding the Fourth Proportional to 51,153.72, 70,591.96 and 28,491.38

Step by Step Solution

1. Step 1: Write the proportion equation
   51,153.72 : 70,591.96 = 28,491.38 : x
2. Step 2: Convert to fraction form
   51,153.72/70,591.96 = 28,491.38/x
3. Step 3: Cross multiply
   51,153.72x = 70,591.96 × 28,491.38
4. Step 4: Simplify right side
   51,153.72x = 2,011,262,357.30
5. Step 5: Solve for x
   x = 2,011,262,357.30/51,153.72
6. Step 6: Final answer
   x = 39,318.01