Finding the Fourth Proportional to 9,328.55, 13,991.30 and 3,781.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,328.55 : 13,991.30 = 3,781.67 : x
2. Step 2: Convert to fraction form
   9,328.55/13,991.30 = 3,781.67/x
3. Step 3: Cross multiply
   9,328.55x = 13,991.30 × 3,781.67
4. Step 4: Simplify right side
   9,328.55x = 52,910,404.79
5. Step 5: Solve for x
   x = 52,910,404.79/9,328.55
6. Step 6: Final answer
   x = 5,671.88