Finding the Fourth Proportional to 2,089.76, 2,883.81 and 1,145.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.76 : 2,883.81 = 1,145.53 : x
2. Step 2: Convert to fraction form
   2,089.76/2,883.81 = 1,145.53/x
3. Step 3: Cross multiply
   2,089.76x = 2,883.81 × 1,145.53
4. Step 4: Simplify right side
   2,089.76x = 3,303,476.45
5. Step 5: Solve for x
   x = 3,303,476.45/2,089.76
6. Step 6: Final answer
   x = 1,580.80