Finding the Fourth Proportional to 260,221.50, 359,105.67 and 140,989.50

Step by Step Solution

1. Step 1: Write the proportion equation
   260,221.50 : 359,105.67 = 140,989.50 : x
2. Step 2: Convert to fraction form
   260,221.50/359,105.67 = 140,989.50/x
3. Step 3: Cross multiply
   260,221.50x = 359,105.67 × 140,989.50
4. Step 4: Simplify right side
   260,221.50x = 50,630,128,860.47
5. Step 5: Solve for x
   x = 50,630,128,860.47/260,221.50
6. Step 6: Final answer
   x = 194,565.51