Finding the Fourth Proportional to 764,804.76, 1,055,456.34 and 420,667.30

Step by Step Solution

1. Step 1: Write the proportion equation
   764,804.76 : 1,055,456.34 = 420,667.30 : x
2. Step 2: Convert to fraction form
   764,804.76/1,055,456.34 = 420,667.30/x
3. Step 3: Cross multiply
   764,804.76x = 1,055,456.34 × 420,667.30
4. Step 4: Simplify right side
   764,804.76x = 443,995,968,815.68
5. Step 5: Solve for x
   x = 443,995,968,815.68/764,804.76
6. Step 6: Final answer
   x = 580,535.05