Finding the Fourth Proportional to 12,128.81, 16,735.23 and 7,092.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.81 : 16,735.23 = 7,092.05 : x
2. Step 2: Convert to fraction form
   12,128.81/16,735.23 = 7,092.05/x
3. Step 3: Cross multiply
   12,128.81x = 16,735.23 × 7,092.05
4. Step 4: Simplify right side
   12,128.81x = 118,687,004.25
5. Step 5: Solve for x
   x = 118,687,004.25/12,128.81
6. Step 6: Final answer
   x = 9,785.55