Finding the Fourth Proportional to 578,758.05, 798,667.56 and 320,624.46

Step by Step Solution

1. Step 1: Write the proportion equation
   578,758.05 : 798,667.56 = 320,624.46 : x
2. Step 2: Convert to fraction form
   578,758.05/798,667.56 = 320,624.46/x
3. Step 3: Cross multiply
   578,758.05x = 798,667.56 × 320,624.46
4. Step 4: Simplify right side
   578,758.05x = 256,072,355,144.52
5. Step 5: Solve for x
   x = 256,072,355,144.52/578,758.05
6. Step 6: Final answer
   x = 442,451.48