Finding the Fourth Proportional to 2,155.86, 2,974.05 and 1,535.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.86 : 2,974.05 = 1,535.22 : x
2. Step 2: Convert to fraction form
   2,155.86/2,974.05 = 1,535.22/x
3. Step 3: Cross multiply
   2,155.86x = 2,974.05 × 1,535.22
4. Step 4: Simplify right side
   2,155.86x = 4,565,821.04
5. Step 5: Solve for x
   x = 4,565,821.04/2,155.86
6. Step 6: Final answer
   x = 2,117.87