Finding the Fourth Proportional to 12,719.57, 17,553.51 and 7,683.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.57 : 17,553.51 = 7,683.39 : x
2. Step 2: Convert to fraction form
   12,719.57/17,553.51 = 7,683.39/x
3. Step 3: Cross multiply
   12,719.57x = 17,553.51 × 7,683.39
4. Step 4: Simplify right side
   12,719.57x = 134,870,463.20
5. Step 5: Solve for x
   x = 134,870,463.20/12,719.57
6. Step 6: Final answer
   x = 10,603.39