Finding the Fourth Proportional to 12,918.18, 17,822.50 and 8,444.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,918.18 : 17,822.50 = 8,444.51 : x
2. Step 2: Convert to fraction form
   12,918.18/17,822.50 = 8,444.51/x
3. Step 3: Cross multiply
   12,918.18x = 17,822.50 × 8,444.51
4. Step 4: Simplify right side
   12,918.18x = 150,502,279.48
5. Step 5: Solve for x
   x = 150,502,279.48/12,918.18
6. Step 6: Final answer
   x = 11,650.42