Finding the Fourth Proportional to 12,994.05, 19,457.87 and 7,144.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994.05 : 19,457.87 = 7,144.23 : x
2. Step 2: Convert to fraction form
   12,994.05/19,457.87 = 7,144.23/x
3. Step 3: Cross multiply
   12,994.05x = 19,457.87 × 7,144.23
4. Step 4: Simplify right side
   12,994.05x = 139,011,462.87
5. Step 5: Solve for x
   x = 139,011,462.87/12,994.05
6. Step 6: Final answer
   x = 10,698.09