Finding the Fourth Proportional to 13,208, 18,227.86 and 7,619

Step by Step Solution

1. Step 1: Write the proportion equation
   13,208 : 18,227.86 = 7,619 : x
2. Step 2: Convert to fraction form
   13,208/18,227.86 = 7,619/x
3. Step 3: Cross multiply
   13,208x = 18,227.86 × 7,619
4. Step 4: Simplify right side
   13,208x = 138,878,065.34
5. Step 5: Solve for x
   x = 138,878,065.34/13,208
6. Step 6: Final answer
   x = 10,514.69