Finding the Fourth Proportional to 257,112.02, 354,815.98 and 142,394.42

Step by Step Solution

1. Step 1: Write the proportion equation
   257,112.02 : 354,815.98 = 142,394.42 : x
2. Step 2: Convert to fraction form
   257,112.02/354,815.98 = 142,394.42/x
3. Step 3: Cross multiply
   257,112.02x = 354,815.98 × 142,394.42
4. Step 4: Simplify right side
   257,112.02x = 50,523,815,678.83
5. Step 5: Solve for x
   x = 50,523,815,678.83/257,112.02
6. Step 6: Final answer
   x = 196,505.07