Finding the Fourth Proportional to 11,389.50, 17,087.13 and 3,181.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,389.50 : 17,087.13 = 3,181.50 : x
2. Step 2: Convert to fraction form
   11,389.50/17,087.13 = 3,181.50/x
3. Step 3: Cross multiply
   11,389.50x = 17,087.13 × 3,181.50
4. Step 4: Simplify right side
   11,389.50x = 54,362,704.10
5. Step 5: Solve for x
   x = 54,362,704.10/11,389.50
6. Step 6: Final answer
   x = 4,773.05