Finding the Fourth Proportional to 1,103.35, 1,654.23 and 518.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.35 : 1,654.23 = 518.05 : x
2. Step 2: Convert to fraction form
   1,103.35/1,654.23 = 518.05/x
3. Step 3: Cross multiply
   1,103.35x = 1,654.23 × 518.05
4. Step 4: Simplify right side
   1,103.35x = 856,976.69
5. Step 5: Solve for x
   x = 856,976.69/1,103.35
6. Step 6: Final answer
   x = 776.70