Finding the Fourth Proportional to 12,424.24, 17,142.52 and 8,398.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,424.24 : 17,142.52 = 8,398.56 : x
2. Step 2: Convert to fraction form
   12,424.24/17,142.52 = 8,398.56/x
3. Step 3: Cross multiply
   12,424.24x = 17,142.52 × 8,398.56
4. Step 4: Simplify right side
   12,424.24x = 143,972,482.77
5. Step 5: Solve for x
   x = 143,972,482.77/12,424.24
6. Step 6: Final answer
   x = 11,588.03