Finding the Fourth Proportional to 2,103.17, 3,152.01 and 1,128.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.17 : 3,152.01 = 1,128.13 : x
2. Step 2: Convert to fraction form
   2,103.17/3,152.01 = 1,128.13/x
3. Step 3: Cross multiply
   2,103.17x = 3,152.01 × 1,128.13
4. Step 4: Simplify right side
   2,103.17x = 3,555,873.39
5. Step 5: Solve for x
   x = 3,555,873.39/2,103.17
6. Step 6: Final answer
   x = 1,690.72