Finding the Fourth Proportional to 12,722.52, 17,556.20 and 7,345.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.52 : 17,556.20 = 7,345.17 : x
2. Step 2: Convert to fraction form
   12,722.52/17,556.20 = 7,345.17/x
3. Step 3: Cross multiply
   12,722.52x = 17,556.20 × 7,345.17
4. Step 4: Simplify right side
   12,722.52x = 128,953,149.05
5. Step 5: Solve for x
   x = 128,953,149.05/12,722.52
6. Step 6: Final answer
   x = 10,135.82