Finding the Fourth Proportional to 42,576.76, 58,744.74 and 28,405

Step by Step Solution

1. Step 1: Write the proportion equation
   42,576.76 : 58,744.74 = 28,405 : x
2. Step 2: Convert to fraction form
   42,576.76/58,744.74 = 28,405/x
3. Step 3: Cross multiply
   42,576.76x = 58,744.74 × 28,405
4. Step 4: Simplify right side
   42,576.76x = 1,668,644,339.70
5. Step 5: Solve for x
   x = 1,668,644,339.70/42,576.76
6. Step 6: Final answer
   x = 39,191.44