Finding the Fourth Proportional to 23,101.74, 31,880.42 and 12,491.37

Step by Step Solution

1. Step 1: Write the proportion equation
   23,101.74 : 31,880.42 = 12,491.37 : x
2. Step 2: Convert to fraction form
   23,101.74/31,880.42 = 12,491.37/x
3. Step 3: Cross multiply
   23,101.74x = 31,880.42 × 12,491.37
4. Step 4: Simplify right side
   23,101.74x = 398,230,059.52
5. Step 5: Solve for x
   x = 398,230,059.52/23,101.74
6. Step 6: Final answer
   x = 17,238.10