Finding the Fourth Proportional to 3,471.48, 4,789.89 and 1,978.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,471.48 : 4,789.89 = 1,978.83 : x
2. Step 2: Convert to fraction form
   3,471.48/4,789.89 = 1,978.83/x
3. Step 3: Cross multiply
   3,471.48x = 4,789.89 × 1,978.83
4. Step 4: Simplify right side
   3,471.48x = 9,478,378.03
5. Step 5: Solve for x
   x = 9,478,378.03/3,471.48
6. Step 6: Final answer
   x = 2,730.36