Finding the Fourth Proportional to 9,001.41, 12,418.48 and 5,638.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,001.41 : 12,418.48 = 5,638.37 : x
2. Step 2: Convert to fraction form
   9,001.41/12,418.48 = 5,638.37/x
3. Step 3: Cross multiply
   9,001.41x = 12,418.48 × 5,638.37
4. Step 4: Simplify right side
   9,001.41x = 70,019,976.60
5. Step 5: Solve for x
   x = 70,019,976.60/9,001.41
6. Step 6: Final answer
   x = 7,778.78