Finding the Fourth Proportional to 16,894.56, 23,279.76 and 12,915.84

Step by Step Solution

1. Step 1: Write the proportion equation
   16,894.56 : 23,279.76 = 12,915.84 : x
2. Step 2: Convert to fraction form
   16,894.56/23,279.76 = 12,915.84/x
3. Step 3: Cross multiply
   16,894.56x = 23,279.76 × 12,915.84
4. Step 4: Simplify right side
   16,894.56x = 300,677,655.40
5. Step 5: Solve for x
   x = 300,677,655.40/16,894.56
6. Step 6: Final answer
   x = 17,797.31