Finding the Fourth Proportional to 243,786.77, 365,622.72 and 137,216.09

Step by Step Solution

1. Step 1: Write the proportion equation
   243,786.77 : 365,622.72 = 137,216.09 : x
2. Step 2: Convert to fraction form
   243,786.77/365,622.72 = 137,216.09/x
3. Step 3: Cross multiply
   243,786.77x = 365,622.72 × 137,216.09
4. Step 4: Simplify right side
   243,786.77x = 50,169,320,053.56
5. Step 5: Solve for x
   x = 50,169,320,053.56/243,786.77
6. Step 6: Final answer
   x = 205,791.81