Finding the Fourth Proportional to 11,418.72, 17,128.44 and 3,098.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,418.72 : 17,128.44 = 3,098.72 : x
2. Step 2: Convert to fraction form
   11,418.72/17,128.44 = 3,098.72/x
3. Step 3: Cross multiply
   11,418.72x = 17,128.44 × 3,098.72
4. Step 4: Simplify right side
   11,418.72x = 53,076,153.95
5. Step 5: Solve for x
   x = 53,076,153.95/11,418.72
6. Step 6: Final answer
   x = 4,648.17