Finding the Fourth Proportional to 2,553.42, 3,804.47 and 2,385.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.42 : 3,804.47 = 2,385.78 : x
2. Step 2: Convert to fraction form
   2,553.42/3,804.47 = 2,385.78/x
3. Step 3: Cross multiply
   2,553.42x = 3,804.47 × 2,385.78
4. Step 4: Simplify right side
   2,553.42x = 9,076,616.51
5. Step 5: Solve for x
   x = 9,076,616.51/2,553.42
6. Step 6: Final answer
   x = 3,554.69