Finding the Fourth Proportional to 1,917.27, 2,874.29 and 1,138.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.27 : 2,874.29 = 1,138.05 : x
2. Step 2: Convert to fraction form
   1,917.27/2,874.29 = 1,138.05/x
3. Step 3: Cross multiply
   1,917.27x = 2,874.29 × 1,138.05
4. Step 4: Simplify right side
   1,917.27x = 3,271,080.04
5. Step 5: Solve for x
   x = 3,271,080.04/1,917.27
6. Step 6: Final answer
   x = 1,706.11