Finding the Fourth Proportional to 1,410.42, 1,944.32 and 989.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.42 : 1,944.32 = 989.48 : x
2. Step 2: Convert to fraction form
   1,410.42/1,944.32 = 989.48/x
3. Step 3: Cross multiply
   1,410.42x = 1,944.32 × 989.48
4. Step 4: Simplify right side
   1,410.42x = 1,923,865.75
5. Step 5: Solve for x
   x = 1,923,865.75/1,410.42
6. Step 6: Final answer
   x = 1,364.04