Finding the Fourth Proportional to 2,103.23, 3,155.07 and 1,007.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.23 : 3,155.07 = 1,007.91 : x
2. Step 2: Convert to fraction form
   2,103.23/3,155.07 = 1,007.91/x
3. Step 3: Cross multiply
   2,103.23x = 3,155.07 × 1,007.91
4. Step 4: Simplify right side
   2,103.23x = 3,180,030.38
5. Step 5: Solve for x
   x = 3,180,030.38/2,103.23
6. Step 6: Final answer
   x = 1,511.97