Finding the Fourth Proportional to 2,785.78, 3,844.32 and 1,543.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.78 : 3,844.32 = 1,543.78 : x
2. Step 2: Convert to fraction form
   2,785.78/3,844.32 = 1,543.78/x
3. Step 3: Cross multiply
   2,785.78x = 3,844.32 × 1,543.78
4. Step 4: Simplify right side
   2,785.78x = 5,934,784.33
5. Step 5: Solve for x
   x = 5,934,784.33/2,785.78
6. Step 6: Final answer
   x = 2,130.39