Finding the Fourth Proportional to 260,144, 358,998.72 and 140,912

Step by Step Solution

1. Step 1: Write the proportion equation
   260,144 : 358,998.72 = 140,912 : x
2. Step 2: Convert to fraction form
   260,144/358,998.72 = 140,912/x
3. Step 3: Cross multiply
   260,144x = 358,998.72 × 140,912
4. Step 4: Simplify right side
   260,144x = 50,587,227,632.64
5. Step 5: Solve for x
   x = 50,587,227,632.64/260,144
6. Step 6: Final answer
   x = 194,458.56