Finding the Fourth Proportional to 12,722.85, 19,078.34 and 7,459.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.85 : 19,078.34 = 7,459.47 : x
2. Step 2: Convert to fraction form
   12,722.85/19,078.34 = 7,459.47/x
3. Step 3: Cross multiply
   12,722.85x = 19,078.34 × 7,459.47
4. Step 4: Simplify right side
   12,722.85x = 142,314,304.88
5. Step 5: Solve for x
   x = 142,314,304.88/12,722.85
6. Step 6: Final answer
   x = 11,185.73