Finding the Fourth Proportional to 12,722.42, 17,556.96 and 7,418.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.42 : 17,556.96 = 7,418.26 : x
2. Step 2: Convert to fraction form
   12,722.42/17,556.96 = 7,418.26/x
3. Step 3: Cross multiply
   12,722.42x = 17,556.96 × 7,418.26
4. Step 4: Simplify right side
   12,722.42x = 130,242,151.51
5. Step 5: Solve for x
   x = 130,242,151.51/12,722.42
6. Step 6: Final answer
   x = 10,237.21