Finding the Fourth Proportional to 21,573.67, 29,765.83 and 12,623.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,573.67 : 29,765.83 = 12,623.37 : x
2. Step 2: Convert to fraction form
   21,573.67/29,765.83 = 12,623.37/x
3. Step 3: Cross multiply
   21,573.67x = 29,765.83 × 12,623.37
4. Step 4: Simplify right side
   21,573.67x = 375,745,085.45
5. Step 5: Solve for x
   x = 375,745,085.45/21,573.67
6. Step 6: Final answer
   x = 17,416.84