Finding the Fourth Proportional to 12,767.36, 19,140.71 and 5,742.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,767.36 : 19,140.71 = 5,742.23 : x
2. Step 2: Convert to fraction form
   12,767.36/19,140.71 = 5,742.23/x
3. Step 3: Cross multiply
   12,767.36x = 19,140.71 × 5,742.23
4. Step 4: Simplify right side
   12,767.36x = 109,910,234.77
5. Step 5: Solve for x
   x = 109,910,234.77/12,767.36
6. Step 6: Final answer
   x = 8,608.69