Finding the Fourth Proportional to 256,928.28, 354,561.72 and 142,214.82

Step by Step Solution

1. Step 1: Write the proportion equation
   256,928.28 : 354,561.72 = 142,214.82 : x
2. Step 2: Convert to fraction form
   256,928.28/354,561.72 = 142,214.82/x
3. Step 3: Cross multiply
   256,928.28x = 354,561.72 × 142,214.82
4. Step 4: Simplify right side
   256,928.28x = 50,423,931,188.69
5. Step 5: Solve for x
   x = 50,423,931,188.69/256,928.28
6. Step 6: Final answer
   x = 196,256.84