Finding the Fourth Proportional to 23,978.61, 33,090.12 and 13,367.97

Step by Step Solution

1. Step 1: Write the proportion equation
   23,978.61 : 33,090.12 = 13,367.97 : x
2. Step 2: Convert to fraction form
   23,978.61/33,090.12 = 13,367.97/x
3. Step 3: Cross multiply
   23,978.61x = 33,090.12 × 13,367.97
4. Step 4: Simplify right side
   23,978.61x = 442,347,731.46
5. Step 5: Solve for x
   x = 442,347,731.46/23,978.61
6. Step 6: Final answer
   x = 18,447.60