Finding the Fourth Proportional to 1,984.59, 2,738.91 and 1,145.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,984.59 : 2,738.91 = 1,145.43 : x
2. Step 2: Convert to fraction form
   1,984.59/2,738.91 = 1,145.43/x
3. Step 3: Cross multiply
   1,984.59x = 2,738.91 × 1,145.43
4. Step 4: Simplify right side
   1,984.59x = 3,137,222.83
5. Step 5: Solve for x
   x = 3,137,222.83/1,984.59
6. Step 6: Final answer
   x = 1,580.79