Finding the Fourth Proportional to 13,618.84, 18,791.96 and 7,649.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,618.84 : 18,791.96 = 7,649.37 : x
2. Step 2: Convert to fraction form
   13,618.84/18,791.96 = 7,649.37/x
3. Step 3: Cross multiply
   13,618.84x = 18,791.96 × 7,649.37
4. Step 4: Simplify right side
   13,618.84x = 143,746,522.86
5. Step 5: Solve for x
   x = 143,746,522.86/13,618.84
6. Step 6: Final answer
   x = 10,554.98