Finding the Fourth Proportional to 13,111.04, 18,100.60 and 9,083.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.04 : 18,100.60 = 9,083.72 : x
2. Step 2: Convert to fraction form
   13,111.04/18,100.60 = 9,083.72/x
3. Step 3: Cross multiply
   13,111.04x = 18,100.60 × 9,083.72
4. Step 4: Simplify right side
   13,111.04x = 164,420,782.23
5. Step 5: Solve for x
   x = 164,420,782.23/13,111.04
6. Step 6: Final answer
   x = 12,540.64