Finding the Fourth Proportional to 12,965.27, 19,450.33 and 5,174.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.27 : 19,450.33 = 5,174.15 : x
2. Step 2: Convert to fraction form
   12,965.27/19,450.33 = 5,174.15/x
3. Step 3: Cross multiply
   12,965.27x = 19,450.33 × 5,174.15
4. Step 4: Simplify right side
   12,965.27x = 100,638,814.78
5. Step 5: Solve for x
   x = 100,638,814.78/12,965.27
6. Step 6: Final answer
   x = 7,762.19