Finding the Fourth Proportional to 13,317.22, 18,377.15 and 7,647.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,317.22 : 18,377.15 = 7,647.98 : x
2. Step 2: Convert to fraction form
   13,317.22/18,377.15 = 7,647.98/x
3. Step 3: Cross multiply
   13,317.22x = 18,377.15 × 7,647.98
4. Step 4: Simplify right side
   13,317.22x = 140,547,945.53
5. Step 5: Solve for x
   x = 140,547,945.53/13,317.22
6. Step 6: Final answer
   x = 10,553.85