Finding the Fourth Proportional to 1,920.39, 2,649.78 and 1,134.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.39 : 2,649.78 = 1,134.57 : x
2. Step 2: Convert to fraction form
   1,920.39/2,649.78 = 1,134.57/x
3. Step 3: Cross multiply
   1,920.39x = 2,649.78 × 1,134.57
4. Step 4: Simplify right side
   1,920.39x = 3,006,360.89
5. Step 5: Solve for x
   x = 3,006,360.89/1,920.39
6. Step 6: Final answer
   x = 1,565.49