Finding the Fourth Proportional to 12,571.85, 18,858.72 and 3,807.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,571.85 : 18,858.72 = 3,807.47 : x
2. Step 2: Convert to fraction form
   12,571.85/18,858.72 = 3,807.47/x
3. Step 3: Cross multiply
   12,571.85x = 18,858.72 × 3,807.47
4. Step 4: Simplify right side
   12,571.85x = 71,804,010.64
5. Step 5: Solve for x
   x = 71,804,010.64/12,571.85
6. Step 6: Final answer
   x = 5,711.49