Finding the Fourth Proportional to 3,754.57, 5,630.49 and 1,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,754.57 : 5,630.49 = 1,288.72 : x
2. Step 2: Convert to fraction form
   3,754.57/5,630.49 = 1,288.72/x
3. Step 3: Cross multiply
   3,754.57x = 5,630.49 × 1,288.72
4. Step 4: Simplify right side
   3,754.57x = 7,256,125.07
5. Step 5: Solve for x
   x = 7,256,125.07/3,754.57
6. Step 6: Final answer
   x = 1,932.61