Finding the Fourth Proportional to 1,104.51, 1,660.71 and 1,018.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.51 : 1,660.71 = 1,018.90 : x
2. Step 2: Convert to fraction form
   1,104.51/1,660.71 = 1,018.90/x
3. Step 3: Cross multiply
   1,104.51x = 1,660.71 × 1,018.90
4. Step 4: Simplify right side
   1,104.51x = 1,692,097.42
5. Step 5: Solve for x
   x = 1,692,097.42/1,104.51
6. Step 6: Final answer
   x = 1,531.99