Finding the Fourth Proportional to 23,142.55, 31,933.30 and 13,070.81

Step by Step Solution

1. Step 1: Write the proportion equation
   23,142.55 : 31,933.30 = 13,070.81 : x
2. Step 2: Convert to fraction form
   23,142.55/31,933.30 = 13,070.81/x
3. Step 3: Cross multiply
   23,142.55x = 31,933.30 × 13,070.81
4. Step 4: Simplify right side
   23,142.55x = 417,394,096.97
5. Step 5: Solve for x
   x = 417,394,096.97/23,142.55
6. Step 6: Final answer
   x = 18,035.79