Finding the Fourth Proportional to 1,891.54, 2,610.39 and 1,105.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.54 : 2,610.39 = 1,105.57 : x
2. Step 2: Convert to fraction form
   1,891.54/2,610.39 = 1,105.57/x
3. Step 3: Cross multiply
   1,891.54x = 2,610.39 × 1,105.57
4. Step 4: Simplify right side
   1,891.54x = 2,885,968.87
5. Step 5: Solve for x
   x = 2,885,968.87/1,891.54
6. Step 6: Final answer
   x = 1,525.72