Finding the Fourth Proportional to 12,383.90, 17,086.77 and 7,538.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,383.90 : 17,086.77 = 7,538.61 : x
2. Step 2: Convert to fraction form
   12,383.90/17,086.77 = 7,538.61/x
3. Step 3: Cross multiply
   12,383.90x = 17,086.77 × 7,538.61
4. Step 4: Simplify right side
   12,383.90x = 128,810,495.19
5. Step 5: Solve for x
   x = 128,810,495.19/12,383.90
6. Step 6: Final answer
   x = 10,401.45