Finding the Fourth Proportional to 256,736.56, 354,404.28 and 156,169.52

Step by Step Solution

1. Step 1: Write the proportion equation
   256,736.56 : 354,404.28 = 156,169.52 : x
2. Step 2: Convert to fraction form
   256,736.56/354,404.28 = 156,169.52/x
3. Step 3: Cross multiply
   256,736.56x = 354,404.28 × 156,169.52
4. Step 4: Simplify right side
   256,736.56x = 55,347,146,293.55
5. Step 5: Solve for x
   x = 55,347,146,293.55/256,736.56
6. Step 6: Final answer
   x = 215,579.53