Finding the Fourth Proportional to 16,764.56, 25,123 and 12,347.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,764.56 : 25,123 = 12,347.28 : x
2. Step 2: Convert to fraction form
   16,764.56/25,123 = 12,347.28/x
3. Step 3: Cross multiply
   16,764.56x = 25,123 × 12,347.28
4. Step 4: Simplify right side
   16,764.56x = 310,200,715.44
5. Step 5: Solve for x
   x = 310,200,715.44/16,764.56
6. Step 6: Final answer
   x = 18,503.36