Finding the Fourth Proportional to 9,164.91, 12,649.38 and 5,389.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,164.91 : 12,649.38 = 5,389.32 : x
2. Step 2: Convert to fraction form
   9,164.91/12,649.38 = 5,389.32/x
3. Step 3: Cross multiply
   9,164.91x = 12,649.38 × 5,389.32
4. Step 4: Simplify right side
   9,164.91x = 68,171,556.62
5. Step 5: Solve for x
   x = 68,171,556.62/9,164.91
6. Step 6: Final answer
   x = 7,438.32