Finding the Fourth Proportional to 23,185.64, 31,996.76 and 13,113.60

Step by Step Solution

1. Step 1: Write the proportion equation
   23,185.64 : 31,996.76 = 13,113.60 : x
2. Step 2: Convert to fraction form
   23,185.64/31,996.76 = 13,113.60/x
3. Step 3: Cross multiply
   23,185.64x = 31,996.76 × 13,113.60
4. Step 4: Simplify right side
   23,185.64x = 419,592,711.94
5. Step 5: Solve for x
   x = 419,592,711.94/23,185.64
6. Step 6: Final answer
   x = 18,097.09