Finding the Fourth Proportional to 369,978.54, 510,570.84 and 200,212.67

Step by Step Solution

1. Step 1: Write the proportion equation
   369,978.54 : 510,570.84 = 200,212.67 : x
2. Step 2: Convert to fraction form
   369,978.54/510,570.84 = 200,212.67/x
3. Step 3: Cross multiply
   369,978.54x = 510,570.84 × 200,212.67
4. Step 4: Simplify right side
   369,978.54x = 102,222,751,100.54
5. Step 5: Solve for x
   x = 102,222,751,100.54/369,978.54
6. Step 6: Final answer
   x = 276,293.73