Finding the Fourth Proportional to 256,875.37, 354,630.49 and 154,926.54

Step by Step Solution

1. Step 1: Write the proportion equation
   256,875.37 : 354,630.49 = 154,926.54 : x
2. Step 2: Convert to fraction form
   256,875.37/354,630.49 = 154,926.54/x
3. Step 3: Cross multiply
   256,875.37x = 354,630.49 × 154,926.54
4. Step 4: Simplify right side
   256,875.37x = 54,941,674,406.89
5. Step 5: Solve for x
   x = 54,941,674,406.89/256,875.37
6. Step 6: Final answer
   x = 213,884.56