Finding the Fourth Proportional to 23,131.76, 31,921.82 and 12,521.48

Step by Step Solution

1. Step 1: Write the proportion equation
   23,131.76 : 31,921.82 = 12,521.48 : x
2. Step 2: Convert to fraction form
   23,131.76/31,921.82 = 12,521.48/x
3. Step 3: Cross multiply
   23,131.76x = 31,921.82 × 12,521.48
4. Step 4: Simplify right side
   23,131.76x = 399,708,430.69
5. Step 5: Solve for x
   x = 399,708,430.69/23,131.76
6. Step 6: Final answer
   x = 17,279.64