Finding the Fourth Proportional to 1,410.85, 1,944.91 and 989.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.85 : 1,944.91 = 989.94 : x
2. Step 2: Convert to fraction form
   1,410.85/1,944.91 = 989.94/x
3. Step 3: Cross multiply
   1,410.85x = 1,944.91 × 989.94
4. Step 4: Simplify right side
   1,410.85x = 1,925,344.21
5. Step 5: Solve for x
   x = 1,925,344.21/1,410.85
6. Step 6: Final answer
   x = 1,364.67