Finding the Fourth Proportional to 269,920.72, 405,127.88 and 136,892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   269,920.72 : 405,127.88 = 136,892.72 : x
2. Step 2: Convert to fraction form
   269,920.72/405,127.88 = 136,892.72/x
3. Step 3: Cross multiply
   269,920.72x = 405,127.88 × 136,892.72
4. Step 4: Simplify right side
   269,920.72x = 55,459,057,441.03
5. Step 5: Solve for x
   x = 55,459,057,441.03/269,920.72
6. Step 6: Final answer
   x = 205,464.25