Finding the Fourth Proportional to 200,128.45, 299,895.57 and 111,259.69

Step by Step Solution

1. Step 1: Write the proportion equation
   200,128.45 : 299,895.57 = 111,259.69 : x
2. Step 2: Convert to fraction form
   200,128.45/299,895.57 = 111,259.69/x
3. Step 3: Cross multiply
   200,128.45x = 299,895.57 × 111,259.69
4. Step 4: Simplify right side
   200,128.45x = 33,366,288,150.57
5. Step 5: Solve for x
   x = 33,366,288,150.57/200,128.45
6. Step 6: Final answer
   x = 166,724.36