Finding the Fourth Proportional to 9,659.89, 14,490.98 and 3,418.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,659.89 : 14,490.98 = 3,418.60 : x
2. Step 2: Convert to fraction form
   9,659.89/14,490.98 = 3,418.60/x
3. Step 3: Cross multiply
   9,659.89x = 14,490.98 × 3,418.60
4. Step 4: Simplify right side
   9,659.89x = 49,538,864.23
5. Step 5: Solve for x
   x = 49,538,864.23/9,659.89
6. Step 6: Final answer
   x = 5,128.31