Finding the Fourth Proportional to 1,104.11, 1,655.03 and 641.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.11 : 1,655.03 = 641.10 : x
2. Step 2: Convert to fraction form
   1,104.11/1,655.03 = 641.10/x
3. Step 3: Cross multiply
   1,104.11x = 1,655.03 × 641.10
4. Step 4: Simplify right side
   1,104.11x = 1,061,038.23
5. Step 5: Solve for x
   x = 1,061,038.23/1,104.11
6. Step 6: Final answer
   x = 960.99