Finding the Fourth Proportional to 23,028.47, 31,771.32 and 12,955.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,028.47 : 31,771.32 = 12,955.31 : x
2. Step 2: Convert to fraction form
   23,028.47/31,771.32 = 12,955.31/x
3. Step 3: Cross multiply
   23,028.47x = 31,771.32 × 12,955.31
4. Step 4: Simplify right side
   23,028.47x = 411,607,299.71
5. Step 5: Solve for x
   x = 411,607,299.71/23,028.47
6. Step 6: Final answer
   x = 17,873.84