Finding the Fourth Proportional to 11,087.90, 16,626.30 and 3,689.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,087.90 : 16,626.30 = 3,689.76 : x
2. Step 2: Convert to fraction form
   11,087.90/16,626.30 = 3,689.76/x
3. Step 3: Cross multiply
   11,087.90x = 16,626.30 × 3,689.76
4. Step 4: Simplify right side
   11,087.90x = 61,347,056.69
5. Step 5: Solve for x
   x = 61,347,056.69/11,087.90
6. Step 6: Final answer
   x = 5,532.79