Finding the Fourth Proportional to 1,528.05, 2,109.61 and 1,108

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.05 : 2,109.61 = 1,108 : x
2. Step 2: Convert to fraction form
   1,528.05/2,109.61 = 1,108/x
3. Step 3: Cross multiply
   1,528.05x = 2,109.61 × 1,108
4. Step 4: Simplify right side
   1,528.05x = 2,337,447.88
5. Step 5: Solve for x
   x = 2,337,447.88/1,528.05
6. Step 6: Final answer
   x = 1,529.69