Finding the Fourth Proportional to 23,166.91, 31,970.49 and 12,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,166.91 : 31,970.49 = 12,556.72 : x
2. Step 2: Convert to fraction form
   23,166.91/31,970.49 = 12,556.72/x
3. Step 3: Cross multiply
   23,166.91x = 31,970.49 × 12,556.72
4. Step 4: Simplify right side
   23,166.91x = 401,444,491.19
5. Step 5: Solve for x
   x = 401,444,491.19/23,166.91
6. Step 6: Final answer
   x = 17,328.36