Finding the Fourth Proportional to 9,111.41, 13,669.03 and 5,164.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.41 : 13,669.03 = 5,164.55 : x
2. Step 2: Convert to fraction form
   9,111.41/13,669.03 = 5,164.55/x
3. Step 3: Cross multiply
   9,111.41x = 13,669.03 × 5,164.55
4. Step 4: Simplify right side
   9,111.41x = 70,594,363.06
5. Step 5: Solve for x
   x = 70,594,363.06/9,111.41
6. Step 6: Final answer
   x = 7,747.91