Finding the Fourth Proportional to 23,978.98, 33,090.33 and 13,906.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,978.98 : 33,090.33 = 13,906.78 : x
2. Step 2: Convert to fraction form
   23,978.98/33,090.33 = 13,906.78/x
3. Step 3: Cross multiply
   23,978.98x = 33,090.33 × 13,906.78
4. Step 4: Simplify right side
   23,978.98x = 460,179,856.71
5. Step 5: Solve for x
   x = 460,179,856.71/23,978.98
6. Step 6: Final answer
   x = 19,190.97