Finding the Fourth Proportional to 509,978.24, 765,133.76 and 243,759.50

Step by Step Solution

1. Step 1: Write the proportion equation
   509,978.24 : 765,133.76 = 243,759.50 : x
2. Step 2: Convert to fraction form
   509,978.24/765,133.76 = 243,759.50/x
3. Step 3: Cross multiply
   509,978.24x = 765,133.76 × 243,759.50
4. Step 4: Simplify right side
   509,978.24x = 186,508,622,770.72
5. Step 5: Solve for x
   x = 186,508,622,770.72/509,978.24
6. Step 6: Final answer
   x = 365,718.79