Finding the Fourth Proportional to 102,796.72, 154,081.72 and 67,243.28

Step by Step Solution

1. Step 1: Write the proportion equation
   102,796.72 : 154,081.72 = 67,243.28 : x
2. Step 2: Convert to fraction form
   102,796.72/154,081.72 = 67,243.28/x
3. Step 3: Cross multiply
   102,796.72x = 154,081.72 × 67,243.28
4. Step 4: Simplify right side
   102,796.72x = 10,360,960,240.84
5. Step 5: Solve for x
   x = 10,360,960,240.84/102,796.72
6. Step 6: Final answer
   x = 100,790.77