Finding the Fourth Proportional to 7,677.60, 11,522.56 and 3,980.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,677.60 : 11,522.56 = 3,980.89 : x
2. Step 2: Convert to fraction form
   7,677.60/11,522.56 = 3,980.89/x
3. Step 3: Cross multiply
   7,677.60x = 11,522.56 × 3,980.89
4. Step 4: Simplify right side
   7,677.60x = 45,870,043.88
5. Step 5: Solve for x
   x = 45,870,043.88/7,677.60
6. Step 6: Final answer
   x = 5,974.53