Finding the Fourth Proportional to 720,978.91, 1,082,118.39 and 384,299.98

Step by Step Solution

1. Step 1: Write the proportion equation
   720,978.91 : 1,082,118.39 = 384,299.98 : x
2. Step 2: Convert to fraction form
   720,978.91/1,082,118.39 = 384,299.98/x
3. Step 3: Cross multiply
   720,978.91x = 1,082,118.39 × 384,299.98
4. Step 4: Simplify right side
   720,978.91x = 415,858,071,488.21
5. Step 5: Solve for x
   x = 415,858,071,488.21/720,978.91
6. Step 6: Final answer
   x = 576,796.45