Finding the Fourth Proportional to 13,618.18, 20,429.31 and 4,852.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,618.18 : 20,429.31 = 4,852.41 : x
2. Step 2: Convert to fraction form
   13,618.18/20,429.31 = 4,852.41/x
3. Step 3: Cross multiply
   13,618.18x = 20,429.31 × 4,852.41
4. Step 4: Simplify right side
   13,618.18x = 99,131,329.72
5. Step 5: Solve for x
   x = 99,131,329.72/13,618.18
6. Step 6: Final answer
   x = 7,279.34