Finding the Fourth Proportional to 17,408.76, 26,131.59 and 10,839.57

Step by Step Solution

1. Step 1: Write the proportion equation
   17,408.76 : 26,131.59 = 10,839.57 : x
2. Step 2: Convert to fraction form
   17,408.76/26,131.59 = 10,839.57/x
3. Step 3: Cross multiply
   17,408.76x = 26,131.59 × 10,839.57
4. Step 4: Simplify right side
   17,408.76x = 283,255,199.02
5. Step 5: Solve for x
   x = 283,255,199.02/17,408.76
6. Step 6: Final answer
   x = 16,270.84