Finding the Fourth Proportional to 2,885.55, 4,328.37 and 911.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,885.55 : 4,328.37 = 911.10 : x
2. Step 2: Convert to fraction form
   2,885.55/4,328.37 = 911.10/x
3. Step 3: Cross multiply
   2,885.55x = 4,328.37 × 911.10
4. Step 4: Simplify right side
   2,885.55x = 3,943,577.91
5. Step 5: Solve for x
   x = 3,943,577.91/2,885.55
6. Step 6: Final answer
   x = 1,366.66