Finding the Fourth Proportional to 1,535.05, 2,115.34 and 1,091.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.05 : 2,115.34 = 1,091.71 : x
2. Step 2: Convert to fraction form
   1,535.05/2,115.34 = 1,091.71/x
3. Step 3: Cross multiply
   1,535.05x = 2,115.34 × 1,091.71
4. Step 4: Simplify right side
   1,535.05x = 2,309,337.83
5. Step 5: Solve for x
   x = 2,309,337.83/1,535.05
6. Step 6: Final answer
   x = 1,504.41