Finding the Fourth Proportional to 23,101.61, 31,880.24 and 12,491.24

Step by Step Solution

1. Step 1: Write the proportion equation
   23,101.61 : 31,880.24 = 12,491.24 : x
2. Step 2: Convert to fraction form
   23,101.61/31,880.24 = 12,491.24/x
3. Step 3: Cross multiply
   23,101.61x = 31,880.24 × 12,491.24
4. Step 4: Simplify right side
   23,101.61x = 398,223,538.47
5. Step 5: Solve for x
   x = 398,223,538.47/23,101.61
6. Step 6: Final answer
   x = 17,237.92