Finding the Fourth Proportional to 2,861.05, 4,291.72 and 888.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.05 : 4,291.72 = 888.05 : x
2. Step 2: Convert to fraction form
   2,861.05/4,291.72 = 888.05/x
3. Step 3: Cross multiply
   2,861.05x = 4,291.72 × 888.05
4. Step 4: Simplify right side
   2,861.05x = 3,811,261.95
5. Step 5: Solve for x
   x = 3,811,261.95/2,861.05
6. Step 6: Final answer
   x = 1,332.12