Finding the Fourth Proportional to 12,772.90, 17,627.69 and 7,107.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,772.90 : 17,627.69 = 7,107.49 : x
2. Step 2: Convert to fraction form
   12,772.90/17,627.69 = 7,107.49/x
3. Step 3: Cross multiply
   12,772.90x = 17,627.69 × 7,107.49
4. Step 4: Simplify right side
   12,772.90x = 125,288,506.72
5. Step 5: Solve for x
   x = 125,288,506.72/12,772.90
6. Step 6: Final answer
   x = 9,808.94