Finding the Fourth Proportional to 3,471.50, 4,789.50 and 1,978.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,471.50 : 4,789.50 = 1,978.38 : x
2. Step 2: Convert to fraction form
   3,471.50/4,789.50 = 1,978.38/x
3. Step 3: Cross multiply
   3,471.50x = 4,789.50 × 1,978.38
4. Step 4: Simplify right side
   3,471.50x = 9,475,451.01
5. Step 5: Solve for x
   x = 9,475,451.01/3,471.50
6. Step 6: Final answer
   x = 2,729.50