Finding the Fourth Proportional to 12,994.30, 19,458.24 and 7,144.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994.30 : 19,458.24 = 7,144.48 : x
2. Step 2: Convert to fraction form
   12,994.30/19,458.24 = 7,144.48/x
3. Step 3: Cross multiply
   12,994.30x = 19,458.24 × 7,144.48
4. Step 4: Simplify right side
   12,994.30x = 139,019,006.52
5. Step 5: Solve for x
   x = 139,019,006.52/12,994.30
6. Step 6: Final answer
   x = 10,698.46