Finding the Fourth Proportional to 258,738.40, 357,033.72 and 145,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   258,738.40 : 357,033.72 = 145,558.72 : x
2. Step 2: Convert to fraction form
   258,738.40/357,033.72 = 145,558.72/x
3. Step 3: Cross multiply
   258,738.40x = 357,033.72 × 145,558.72
4. Step 4: Simplify right side
   258,738.40x = 51,969,371,280.04
5. Step 5: Solve for x
   x = 51,969,371,280.04/258,738.40
6. Step 6: Final answer
   x = 200,856.82