Finding the Fourth Proportional to 21,960.89, 30,298.16 and 12,523.99

Step by Step Solution

1. Step 1: Write the proportion equation
   21,960.89 : 30,298.16 = 12,523.99 : x
2. Step 2: Convert to fraction form
   21,960.89/30,298.16 = 12,523.99/x
3. Step 3: Cross multiply
   21,960.89x = 30,298.16 × 12,523.99
4. Step 4: Simplify right side
   21,960.89x = 379,453,638.75
5. Step 5: Solve for x
   x = 379,453,638.75/21,960.89
6. Step 6: Final answer
   x = 17,278.61