Finding the Fourth Proportional to 9,840.53, 13,649.52 and 9,485.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,840.53 : 13,649.52 = 9,485.89 : x
2. Step 2: Convert to fraction form
   9,840.53/13,649.52 = 9,485.89/x
3. Step 3: Cross multiply
   9,840.53x = 13,649.52 × 9,485.89
4. Step 4: Simplify right side
   9,840.53x = 129,477,845.27
5. Step 5: Solve for x
   x = 129,477,845.27/9,840.53
6. Step 6: Final answer
   x = 13,157.61