Finding the Fourth Proportional to 256,540.52, 353,796.72 and 161,056.12

Step by Step Solution

1. Step 1: Write the proportion equation
   256,540.52 : 353,796.72 = 161,056.12 : x
2. Step 2: Convert to fraction form
   256,540.52/353,796.72 = 161,056.12/x
3. Step 3: Cross multiply
   256,540.52x = 353,796.72 × 161,056.12
4. Step 4: Simplify right side
   256,540.52x = 56,981,126,991.93
5. Step 5: Solve for x
   x = 56,981,126,991.93/256,540.52
6. Step 6: Final answer
   x = 222,113.56