Finding the Fourth Proportional to 1,441.91, 1,990.10 and 1,130.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.91 : 1,990.10 = 1,130.87 : x
2. Step 2: Convert to fraction form
   1,441.91/1,990.10 = 1,130.87/x
3. Step 3: Cross multiply
   1,441.91x = 1,990.10 × 1,130.87
4. Step 4: Simplify right side
   1,441.91x = 2,250,544.39
5. Step 5: Solve for x
   x = 2,250,544.39/1,441.91
6. Step 6: Final answer
   x = 1,560.81