Finding the Fourth Proportional to 272,131.83, 408,144.43 and 258,629.53

Step by Step Solution

1. Step 1: Write the proportion equation
   272,131.83 : 408,144.43 = 258,629.53 : x
2. Step 2: Convert to fraction form
   272,131.83/408,144.43 = 258,629.53/x
3. Step 3: Cross multiply
   272,131.83x = 408,144.43 × 258,629.53
4. Step 4: Simplify right side
   272,131.83x = 105,558,202,103.02
5. Step 5: Solve for x
   x = 105,558,202,103.02/272,131.83
6. Step 6: Final answer
   x = 387,893.63