Finding the Fourth Proportional to 1,528.83, 2,106.77 and 1,085.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.83 : 2,106.77 = 1,085.96 : x
2. Step 2: Convert to fraction form
   1,528.83/2,106.77 = 1,085.96/x
3. Step 3: Cross multiply
   1,528.83x = 2,106.77 × 1,085.96
4. Step 4: Simplify right side
   1,528.83x = 2,287,867.79
5. Step 5: Solve for x
   x = 2,287,867.79/1,528.83
6. Step 6: Final answer
   x = 1,496.48