Finding the Fourth Proportional to 1,928.85, 2,661.69 and 1,142.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.85 : 2,661.69 = 1,142.88 : x
2. Step 2: Convert to fraction form
   1,928.85/2,661.69 = 1,142.88/x
3. Step 3: Cross multiply
   1,928.85x = 2,661.69 × 1,142.88
4. Step 4: Simplify right side
   1,928.85x = 3,041,992.27
5. Step 5: Solve for x
   x = 3,041,992.27/1,928.85
6. Step 6: Final answer
   x = 1,577.10