Finding the Fourth Proportional to 12,708.23, 19,064.89 and 4,388.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708.23 : 19,064.89 = 4,388.55 : x
2. Step 2: Convert to fraction form
   12,708.23/19,064.89 = 4,388.55/x
3. Step 3: Cross multiply
   12,708.23x = 19,064.89 × 4,388.55
4. Step 4: Simplify right side
   12,708.23x = 83,667,223.01
5. Step 5: Solve for x
   x = 83,667,223.01/12,708.23
6. Step 6: Final answer
   x = 6,583.71