Finding the Fourth Proportional to 19,607.85, 29,395.37 and 13,667.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,607.85 : 29,395.37 = 13,667.31 : x
2. Step 2: Convert to fraction form
   19,607.85/29,395.37 = 13,667.31/x
3. Step 3: Cross multiply
   19,607.85x = 29,395.37 × 13,667.31
4. Step 4: Simplify right side
   19,607.85x = 401,755,566.02
5. Step 5: Solve for x
   x = 401,755,566.02/19,607.85
6. Step 6: Final answer
   x = 20,489.53