Finding the Fourth Proportional to 257,507.83, 355,365.06 and 142,791.31

Step by Step Solution

1. Step 1: Write the proportion equation
   257,507.83 : 355,365.06 = 142,791.31 : x
2. Step 2: Convert to fraction form
   257,507.83/355,365.06 = 142,791.31/x
3. Step 3: Cross multiply
   257,507.83x = 355,365.06 × 142,791.31
4. Step 4: Simplify right side
   257,507.83x = 50,743,042,445.63
5. Step 5: Solve for x
   x = 50,743,042,445.63/257,507.83
6. Step 6: Final answer
   x = 197,054.37