Finding the Fourth Proportional to 9,156.50, 13,726.60 and 3,311.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.50 : 13,726.60 = 3,311.81 : x
2. Step 2: Convert to fraction form
   9,156.50/13,726.60 = 3,311.81/x
3. Step 3: Cross multiply
   9,156.50x = 13,726.60 × 3,311.81
4. Step 4: Simplify right side
   9,156.50x = 45,459,891.15
5. Step 5: Solve for x
   x = 45,459,891.15/9,156.50
6. Step 6: Final answer
   x = 4,964.77