Finding the Fourth Proportional to 9,181.89, 12,668.76 and 5,405.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,181.89 : 12,668.76 = 5,405.22 : x
2. Step 2: Convert to fraction form
   9,181.89/12,668.76 = 5,405.22/x
3. Step 3: Cross multiply
   9,181.89x = 12,668.76 × 5,405.22
4. Step 4: Simplify right side
   9,181.89x = 68,477,434.93
5. Step 5: Solve for x
   x = 68,477,434.93/9,181.89
6. Step 6: Final answer
   x = 7,457.88