Finding the Fourth Proportional to 7,980.84, 11,969.72 and 4,690.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,980.84 : 11,969.72 = 4,690.09 : x
2. Step 2: Convert to fraction form
   7,980.84/11,969.72 = 4,690.09/x
3. Step 3: Cross multiply
   7,980.84x = 11,969.72 × 4,690.09
4. Step 4: Simplify right side
   7,980.84x = 56,139,082.72
5. Step 5: Solve for x
   x = 56,139,082.72/7,980.84
6. Step 6: Final answer
   x = 7,034.23