Finding the Fourth Proportional to 21,123.74, 31,674.25 and 8,467.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.74 : 31,674.25 = 8,467.15 : x
2. Step 2: Convert to fraction form
   21,123.74/31,674.25 = 8,467.15/x
3. Step 3: Cross multiply
   21,123.74x = 31,674.25 × 8,467.15
4. Step 4: Simplify right side
   21,123.74x = 268,190,525.53
5. Step 5: Solve for x
   x = 268,190,525.53/21,123.74
6. Step 6: Final answer
   x = 12,696.17