Finding the Fourth Proportional to 478,019, 659,697.72 and 276,815

Step by Step Solution

1. Step 1: Write the proportion equation
   478,019 : 659,697.72 = 276,815 : x
2. Step 2: Convert to fraction form
   478,019/659,697.72 = 276,815/x
3. Step 3: Cross multiply
   478,019x = 659,697.72 × 276,815
4. Step 4: Simplify right side
   478,019x = 182,614,224,361.80
5. Step 5: Solve for x
   x = 182,614,224,361.80/478,019
6. Step 6: Final answer
   x = 382,022.94