Finding the Fourth Proportional to 12,769.72, 17,622.12 and 7,180.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,769.72 : 17,622.12 = 7,180.72 : x
2. Step 2: Convert to fraction form
   12,769.72/17,622.12 = 7,180.72/x
3. Step 3: Cross multiply
   12,769.72x = 17,622.12 × 7,180.72
4. Step 4: Simplify right side
   12,769.72x = 126,539,509.53
5. Step 5: Solve for x
   x = 126,539,509.53/12,769.72
6. Step 6: Final answer
   x = 9,909.34