Finding the Fourth Proportional to 1,555.05, 2,144.79 and 1,100.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.05 : 2,144.79 = 1,100.61 : x
2. Step 2: Convert to fraction form
   1,555.05/2,144.79 = 1,100.61/x
3. Step 3: Cross multiply
   1,555.05x = 2,144.79 × 1,100.61
4. Step 4: Simplify right side
   1,555.05x = 2,360,577.32
5. Step 5: Solve for x
   x = 2,360,577.32/1,555.05
6. Step 6: Final answer
   x = 1,518.00