Finding the Fourth Proportional to 420,978.56, 628,396.82 and 367,833.92

Step by Step Solution

1. Step 1: Write the proportion equation
   420,978.56 : 628,396.82 = 367,833.92 : x
2. Step 2: Convert to fraction form
   420,978.56/628,396.82 = 367,833.92/x
3. Step 3: Cross multiply
   420,978.56x = 628,396.82 × 367,833.92
4. Step 4: Simplify right side
   420,978.56x = 231,145,665,616.13
5. Step 5: Solve for x
   x = 231,145,665,616.13/420,978.56
6. Step 6: Final answer
   x = 549,067.55