Finding the Fourth Proportional to 256,481.37, 384,386.72 and 137,897.37

Step by Step Solution

1. Step 1: Write the proportion equation
   256,481.37 : 384,386.72 = 137,897.37 : x
2. Step 2: Convert to fraction form
   256,481.37/384,386.72 = 137,897.37/x
3. Step 3: Cross multiply
   256,481.37x = 384,386.72 × 137,897.37
4. Step 4: Simplify right side
   256,481.37x = 53,005,917,061.44
5. Step 5: Solve for x
   x = 53,005,917,061.44/256,481.37
6. Step 6: Final answer
   x = 206,665.76