Finding the Fourth Proportional to 200,405.28, 300,718.56 and 111,708.72

Step by Step Solution

1. Step 1: Write the proportion equation
   200,405.28 : 300,718.56 = 111,708.72 : x
2. Step 2: Convert to fraction form
   200,405.28/300,718.56 = 111,708.72/x
3. Step 3: Cross multiply
   200,405.28x = 300,718.56 × 111,708.72
4. Step 4: Simplify right side
   200,405.28x = 33,592,885,417.84
5. Step 5: Solve for x
   x = 33,592,885,417.84/200,405.28
6. Step 6: Final answer
   x = 167,624.75