Finding the Fourth Proportional to 764,605.40, 1,055,182.56 and 420,467.50

Step by Step Solution

1. Step 1: Write the proportion equation
   764,605.40 : 1,055,182.56 = 420,467.50 : x
2. Step 2: Convert to fraction form
   764,605.40/1,055,182.56 = 420,467.50/x
3. Step 3: Cross multiply
   764,605.40x = 1,055,182.56 × 420,467.50
4. Step 4: Simplify right side
   764,605.40x = 443,669,967,770.89
5. Step 5: Solve for x
   x = 443,669,967,770.89/764,605.40
6. Step 6: Final answer
   x = 580,260.05