Finding the Fourth Proportional to 1,100.81, 1,650.05 and 684.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.81 : 1,650.05 = 684.35 : x
2. Step 2: Convert to fraction form
   1,100.81/1,650.05 = 684.35/x
3. Step 3: Cross multiply
   1,100.81x = 1,650.05 × 684.35
4. Step 4: Simplify right side
   1,100.81x = 1,129,205.18
5. Step 5: Solve for x
   x = 1,129,205.18/1,100.81
6. Step 6: Final answer
   x = 1,025.79