Finding the Fourth Proportional to 256,079.42, 353,389.89 and 142,902.14

Step by Step Solution

1. Step 1: Write the proportion equation
   256,079.42 : 353,389.89 = 142,902.14 : x
2. Step 2: Convert to fraction form
   256,079.42/353,389.89 = 142,902.14/x
3. Step 3: Cross multiply
   256,079.42x = 353,389.89 × 142,902.14
4. Step 4: Simplify right side
   256,079.42x = 50,500,171,535.36
5. Step 5: Solve for x
   x = 50,500,171,535.36/256,079.42
6. Step 6: Final answer
   x = 197,205.12