Finding the Fourth Proportional to 1,891.45, 2,610.13 and 1,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.45 : 2,610.13 = 1,105.50 : x
2. Step 2: Convert to fraction form
   1,891.45/2,610.13 = 1,105.50/x
3. Step 3: Cross multiply
   1,891.45x = 2,610.13 × 1,105.50
4. Step 4: Simplify right side
   1,891.45x = 2,885,498.72
5. Step 5: Solve for x
   x = 2,885,498.72/1,891.45
6. Step 6: Final answer
   x = 1,525.55