Finding the Fourth Proportional to 12,398.19, 17,111.06 and 7,683.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,398.19 : 17,111.06 = 7,683.18 : x
2. Step 2: Convert to fraction form
   12,398.19/17,111.06 = 7,683.18/x
3. Step 3: Cross multiply
   12,398.19x = 17,111.06 × 7,683.18
4. Step 4: Simplify right side
   12,398.19x = 131,467,353.97
5. Step 5: Solve for x
   x = 131,467,353.97/12,398.19
6. Step 6: Final answer
   x = 10,603.75