Finding the Fourth Proportional to 12,129.56, 16,736.28 and 7,092.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,129.56 : 16,736.28 = 7,092.80 : x
2. Step 2: Convert to fraction form
   12,129.56/16,736.28 = 7,092.80/x
3. Step 3: Cross multiply
   12,129.56x = 16,736.28 × 7,092.80
4. Step 4: Simplify right side
   12,129.56x = 118,707,086.78
5. Step 5: Solve for x
   x = 118,707,086.78/12,129.56
6. Step 6: Final answer
   x = 9,786.59