Finding the Fourth Proportional to 12,774.43, 17,628.72 and 7,109.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,774.43 : 17,628.72 = 7,109.69 : x
2. Step 2: Convert to fraction form
   12,774.43/17,628.72 = 7,109.69/x
3. Step 3: Cross multiply
   12,774.43x = 17,628.72 × 7,109.69
4. Step 4: Simplify right side
   12,774.43x = 125,334,734.30
5. Step 5: Solve for x
   x = 125,334,734.30/12,774.43
6. Step 6: Final answer
   x = 9,811.38