Finding the Fourth Proportional to 259,867.50, 358,617.15 and 140,635.50

Step by Step Solution

1. Step 1: Write the proportion equation
   259,867.50 : 358,617.15 = 140,635.50 : x
2. Step 2: Convert to fraction form
   259,867.50/358,617.15 = 140,635.50/x
3. Step 3: Cross multiply
   259,867.50x = 358,617.15 × 140,635.50
4. Step 4: Simplify right side
   259,867.50x = 50,434,302,198.83
5. Step 5: Solve for x
   x = 50,434,302,198.83/259,867.50
6. Step 6: Final answer
   x = 194,076.99