Finding the Fourth Proportional to 12,607, 17,401.98 and 7,639

Step by Step Solution

1. Step 1: Write the proportion equation
   12,607 : 17,401.98 = 7,639 : x
2. Step 2: Convert to fraction form
   12,607/17,401.98 = 7,639/x
3. Step 3: Cross multiply
   12,607x = 17,401.98 × 7,639
4. Step 4: Simplify right side
   12,607x = 132,933,725.22
5. Step 5: Solve for x
   x = 132,933,725.22/12,607
6. Step 6: Final answer
   x = 10,544.44