Finding the Fourth Proportional to 23,165.30, 31,968.18 and 13,603.34

Step by Step Solution

1. Step 1: Write the proportion equation
   23,165.30 : 31,968.18 = 13,603.34 : x
2. Step 2: Convert to fraction form
   23,165.30/31,968.18 = 13,603.34/x
3. Step 3: Cross multiply
   23,165.30x = 31,968.18 × 13,603.34
4. Step 4: Simplify right side
   23,165.30x = 434,874,021.72
5. Step 5: Solve for x
   x = 434,874,021.72/23,165.30
6. Step 6: Final answer
   x = 18,772.65