Finding the Fourth Proportional to 3,885.92, 5,827.62 and 1,288.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,885.92 : 5,827.62 = 1,288.25 : x
2. Step 2: Convert to fraction form
   3,885.92/5,827.62 = 1,288.25/x
3. Step 3: Cross multiply
   3,885.92x = 5,827.62 × 1,288.25
4. Step 4: Simplify right side
   3,885.92x = 7,507,431.47
5. Step 5: Solve for x
   x = 7,507,431.47/3,885.92
6. Step 6: Final answer
   x = 1,931.96