Finding the Fourth Proportional to 9,986.48, 13,839.59 and 9,845.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.48 : 13,839.59 = 9,845.54 : x
2. Step 2: Convert to fraction form
   9,986.48/13,839.59 = 9,845.54/x
3. Step 3: Cross multiply
   9,986.48x = 13,839.59 × 9,845.54
4. Step 4: Simplify right side
   9,986.48x = 136,258,118.50
5. Step 5: Solve for x
   x = 136,258,118.50/9,986.48
6. Step 6: Final answer
   x = 13,644.27