Finding the Fourth Proportional to 2,588.72, 3,881.88 and 833.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,588.72 : 3,881.88 = 833.40 : x
2. Step 2: Convert to fraction form
   2,588.72/3,881.88 = 833.40/x
3. Step 3: Cross multiply
   2,588.72x = 3,881.88 × 833.40
4. Step 4: Simplify right side
   2,588.72x = 3,235,158.79
5. Step 5: Solve for x
   x = 3,235,158.79/2,588.72
6. Step 6: Final answer
   x = 1,249.71