Finding the Fourth Proportional to 23,166.68, 31,970.06 and 12,556.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,166.68 : 31,970.06 = 12,556.28 : x
2. Step 2: Convert to fraction form
   23,166.68/31,970.06 = 12,556.28/x
3. Step 3: Cross multiply
   23,166.68x = 31,970.06 × 12,556.28
4. Step 4: Simplify right side
   23,166.68x = 401,425,024.98
5. Step 5: Solve for x
   x = 401,425,024.98/23,166.68
6. Step 6: Final answer
   x = 17,327.69