Finding the Fourth Proportional to 23,978.72, 33,090.69 and 13,369.04

Step by Step Solution

1. Step 1: Write the proportion equation
   23,978.72 : 33,090.69 = 13,369.04 : x
2. Step 2: Convert to fraction form
   23,978.72/33,090.69 = 13,369.04/x
3. Step 3: Cross multiply
   23,978.72x = 33,090.69 × 13,369.04
4. Step 4: Simplify right side
   23,978.72x = 442,390,758.24
5. Step 5: Solve for x
   x = 442,390,758.24/23,978.72
6. Step 6: Final answer
   x = 18,449.31