Finding the Fourth Proportional to 15,978.84, 23,933.34 and 13,174

Step by Step Solution

1. Step 1: Write the proportion equation
   15,978.84 : 23,933.34 = 13,174 : x
2. Step 2: Convert to fraction form
   15,978.84/23,933.34 = 13,174/x
3. Step 3: Cross multiply
   15,978.84x = 23,933.34 × 13,174
4. Step 4: Simplify right side
   15,978.84x = 315,297,821.16
5. Step 5: Solve for x
   x = 315,297,821.16/15,978.84
6. Step 6: Final answer
   x = 19,732.21