Finding the Fourth Proportional to 12,912.56, 19,367.03 and 4,146.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912.56 : 19,367.03 = 4,146.34 : x
2. Step 2: Convert to fraction form
   12,912.56/19,367.03 = 4,146.34/x
3. Step 3: Cross multiply
   12,912.56x = 19,367.03 × 4,146.34
4. Step 4: Simplify right side
   12,912.56x = 80,302,222.02
5. Step 5: Solve for x
   x = 80,302,222.02/12,912.56
6. Step 6: Final answer
   x = 6,218.92