Finding the Fourth Proportional to 3,885.84, 5,826.33 and 1,288.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,885.84 : 5,826.33 = 1,288.17 : x
2. Step 2: Convert to fraction form
   3,885.84/5,826.33 = 1,288.17/x
3. Step 3: Cross multiply
   3,885.84x = 5,826.33 × 1,288.17
4. Step 4: Simplify right side
   3,885.84x = 7,505,303.52
5. Step 5: Solve for x
   x = 7,505,303.52/3,885.84
6. Step 6: Final answer
   x = 1,931.45