Finding the Fourth Proportional to 2,385.72, 3,288.84 and 1,675.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.72 : 3,288.84 = 1,675.40 : x
2. Step 2: Convert to fraction form
   2,385.72/3,288.84 = 1,675.40/x
3. Step 3: Cross multiply
   2,385.72x = 3,288.84 × 1,675.40
4. Step 4: Simplify right side
   2,385.72x = 5,510,122.54
5. Step 5: Solve for x
   x = 5,510,122.54/2,385.72
6. Step 6: Final answer
   x = 2,309.63