Finding the Fourth Proportional to 679,447.34, 1,019,293.59 and 279,870.02

Step by Step Solution

1. Step 1: Write the proportion equation
   679,447.34 : 1,019,293.59 = 279,870.02 : x
2. Step 2: Convert to fraction form
   679,447.34/1,019,293.59 = 279,870.02/x
3. Step 3: Cross multiply
   679,447.34x = 1,019,293.59 × 279,870.02
4. Step 4: Simplify right side
   679,447.34x = 285,269,717,419.17
5. Step 5: Solve for x
   x = 285,269,717,419.17/679,447.34
6. Step 6: Final answer
   x = 419,855.52