Finding the Fourth Proportional to 3,969.34, 5,480.25 and 2,553.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969.34 : 5,480.25 = 2,553.67 : x
2. Step 2: Convert to fraction form
   3,969.34/5,480.25 = 2,553.67/x
3. Step 3: Cross multiply
   3,969.34x = 5,480.25 × 2,553.67
4. Step 4: Simplify right side
   3,969.34x = 13,994,750.02
5. Step 5: Solve for x
   x = 13,994,750.02/3,969.34
6. Step 6: Final answer
   x = 3,525.71