Finding the Fourth Proportional to 3,888.52, 5,831.50 and 1,290.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,888.52 : 5,831.50 = 1,290.76 : x
2. Step 2: Convert to fraction form
   3,888.52/5,831.50 = 1,290.76/x
3. Step 3: Cross multiply
   3,888.52x = 5,831.50 × 1,290.76
4. Step 4: Simplify right side
   3,888.52x = 7,527,066.94
5. Step 5: Solve for x
   x = 7,527,066.94/3,888.52
6. Step 6: Final answer
   x = 1,935.72