Finding the Fourth Proportional to 11,885.85, 16,401.82 and 7,105.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,885.85 : 16,401.82 = 7,105.90 : x
2. Step 2: Convert to fraction form
   11,885.85/16,401.82 = 7,105.90/x
3. Step 3: Cross multiply
   11,885.85x = 16,401.82 × 7,105.90
4. Step 4: Simplify right side
   11,885.85x = 116,549,692.74
5. Step 5: Solve for x
   x = 116,549,692.74/11,885.85
6. Step 6: Final answer
   x = 9,805.75