Finding the Fourth Proportional to 207,243.02, 310,864.56 and 137,105.96

Step by Step Solution

1. Step 1: Write the proportion equation
   207,243.02 : 310,864.56 = 137,105.96 : x
2. Step 2: Convert to fraction form
   207,243.02/310,864.56 = 137,105.96/x
3. Step 3: Cross multiply
   207,243.02x = 310,864.56 × 137,105.96
4. Step 4: Simplify right side
   207,243.02x = 42,621,383,928.78
5. Step 5: Solve for x
   x = 42,621,383,928.78/207,243.02
6. Step 6: Final answer
   x = 205,658.96