Finding the Fourth Proportional to 9,111.61, 13,650.76 and 6,606.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.61 : 13,650.76 = 6,606.60 : x
2. Step 2: Convert to fraction form
   9,111.61/13,650.76 = 6,606.60/x
3. Step 3: Cross multiply
   9,111.61x = 13,650.76 × 6,606.60
4. Step 4: Simplify right side
   9,111.61x = 90,185,111.02
5. Step 5: Solve for x
   x = 90,185,111.02/9,111.61
6. Step 6: Final answer
   x = 9,897.82