Finding the Fourth Proportional to 3,944.90, 5,913.86 and 1,478.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,944.90 : 5,913.86 = 1,478.00 : x
2. Step 2: Convert to fraction form
   3,944.90/5,913.86 = 1,478.00/x
3. Step 3: Cross multiply
   3,944.90x = 5,913.86 × 1,478.00
4. Step 4: Simplify right side
   3,944.90x = 8,740,667.52
5. Step 5: Solve for x
   x = 8,740,667.52/3,944.90
6. Step 6: Final answer
   x = 2,215.69