Finding the Fourth Proportional to 23,005.86, 31,745.88 and 12,931.98

Step by Step Solution

1. Step 1: Write the proportion equation
   23,005.86 : 31,745.88 = 12,931.98 : x
2. Step 2: Convert to fraction form
   23,005.86/31,745.88 = 12,931.98/x
3. Step 3: Cross multiply
   23,005.86x = 31,745.88 × 12,931.98
4. Step 4: Simplify right side
   23,005.86x = 410,537,085.24
5. Step 5: Solve for x
   x = 410,537,085.24/23,005.86
6. Step 6: Final answer
   x = 17,844.89