Finding the Fourth Proportional to 12,950.10, 19,416.78 and 7,105.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,950.10 : 19,416.78 = 7,105.14 : x
2. Step 2: Convert to fraction form
   12,950.10/19,416.78 = 7,105.14/x
3. Step 3: Cross multiply
   12,950.10x = 19,416.78 × 7,105.14
4. Step 4: Simplify right side
   12,950.10x = 137,958,940.25
5. Step 5: Solve for x
   x = 137,958,940.25/12,950.10
6. Step 6: Final answer
   x = 10,653.12