Finding the Fourth Proportional to 259,321.50, 357,863.67 and 140,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   259,321.50 : 357,863.67 = 140,089.50 : x
2. Step 2: Convert to fraction form
   259,321.50/357,863.67 = 140,089.50/x
3. Step 3: Cross multiply
   259,321.50x = 357,863.67 × 140,089.50
4. Step 4: Simplify right side
   259,321.50x = 50,132,942,598.47
5. Step 5: Solve for x
   x = 50,132,942,598.47/259,321.50
6. Step 6: Final answer
   x = 193,323.51