Finding the Fourth Proportional to 12,726.64, 19,082.20 and 5,705.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,726.64 : 19,082.20 = 5,705.36 : x
2. Step 2: Convert to fraction form
   12,726.64/19,082.20 = 5,705.36/x
3. Step 3: Cross multiply
   12,726.64x = 19,082.20 × 5,705.36
4. Step 4: Simplify right side
   12,726.64x = 108,870,820.59
5. Step 5: Solve for x
   x = 108,870,820.59/12,726.64
6. Step 6: Final answer
   x = 8,554.56