Finding the Fourth Proportional to 9,171.05, 12,655.91 and 5,585.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.05 : 12,655.91 = 5,585.18 : x
2. Step 2: Convert to fraction form
   9,171.05/12,655.91 = 5,585.18/x
3. Step 3: Cross multiply
   9,171.05x = 12,655.91 × 5,585.18
4. Step 4: Simplify right side
   9,171.05x = 70,685,486.10
5. Step 5: Solve for x
   x = 70,685,486.10/9,171.05
6. Step 6: Final answer
   x = 7,707.46