Finding the Fourth Proportional to 1,528.02, 2,106.81 and 1,085.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.02 : 2,106.81 = 1,085.58 : x
2. Step 2: Convert to fraction form
   1,528.02/2,106.81 = 1,085.58/x
3. Step 3: Cross multiply
   1,528.02x = 2,106.81 × 1,085.58
4. Step 4: Simplify right side
   1,528.02x = 2,287,110.80
5. Step 5: Solve for x
   x = 2,287,110.80/1,528.02
6. Step 6: Final answer
   x = 1,496.78