Finding the Fourth Proportional to 1,103.43, 1,655.83 and 641.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.43 : 1,655.83 = 641.43 : x
2. Step 2: Convert to fraction form
   1,103.43/1,655.83 = 641.43/x
3. Step 3: Cross multiply
   1,103.43x = 1,655.83 × 641.43
4. Step 4: Simplify right side
   1,103.43x = 1,062,089.15
5. Step 5: Solve for x
   x = 1,062,089.15/1,103.43
6. Step 6: Final answer
   x = 962.53