Finding the Fourth Proportional to 9,885.39, 13,633.96 and 8,398.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,885.39 : 13,633.96 = 8,398.23 : x
2. Step 2: Convert to fraction form
   9,885.39/13,633.96 = 8,398.23/x
3. Step 3: Cross multiply
   9,885.39x = 13,633.96 × 8,398.23
4. Step 4: Simplify right side
   9,885.39x = 114,501,131.89
5. Step 5: Solve for x
   x = 114,501,131.89/9,885.39
6. Step 6: Final answer
   x = 11,582.86