Finding the Fourth Proportional to 7,421.30, 11,131.83 and 2,980.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,421.30 : 11,131.83 = 2,980.09 : x
2. Step 2: Convert to fraction form
   7,421.30/11,131.83 = 2,980.09/x
3. Step 3: Cross multiply
   7,421.30x = 11,131.83 × 2,980.09
4. Step 4: Simplify right side
   7,421.30x = 33,173,847.81
5. Step 5: Solve for x
   x = 33,173,847.81/7,421.30
6. Step 6: Final answer
   x = 4,470.09