Finding the Fourth Proportional to 3,798.30, 5,171.34 and 3,786.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,798.30 : 5,171.34 = 3,786.60 : x
2. Step 2: Convert to fraction form
   3,798.30/5,171.34 = 3,786.60/x
3. Step 3: Cross multiply
   3,798.30x = 5,171.34 × 3,786.60
4. Step 4: Simplify right side
   3,798.30x = 19,581,796.04
5. Step 5: Solve for x
   x = 19,581,796.04/3,798.30
6. Step 6: Final answer
   x = 5,155.41