Finding the Fourth Proportional to 243,150.54, 335,507.61 and 135,720.54

Step by Step Solution

1. Step 1: Write the proportion equation
   243,150.54 : 335,507.61 = 135,720.54 : x
2. Step 2: Convert to fraction form
   243,150.54/335,507.61 = 135,720.54/x
3. Step 3: Cross multiply
   243,150.54x = 335,507.61 × 135,720.54
4. Step 4: Simplify right side
   243,150.54x = 45,535,274,003.31
5. Step 5: Solve for x
   x = 45,535,274,003.31/243,150.54
6. Step 6: Final answer
   x = 187,271.94