Finding the Fourth Proportional to 764,407.76, 1,054,855.83 and 420,241.18

Step by Step Solution

1. Step 1: Write the proportion equation
   764,407.76 : 1,054,855.83 = 420,241.18 : x
2. Step 2: Convert to fraction form
   764,407.76/1,054,855.83 = 420,241.18/x
3. Step 3: Cross multiply
   764,407.76x = 1,054,855.83 × 420,241.18
4. Step 4: Simplify right side
   764,407.76x = 443,293,857,978.30
5. Step 5: Solve for x
   x = 443,293,857,978.30/764,407.76
6. Step 6: Final answer
   x = 579,918.05