Finding the Fourth Proportional to 764,335.38, 1,054,796.23 and 420,185.81

Step by Step Solution

1. Step 1: Write the proportion equation
   764,335.38 : 1,054,796.23 = 420,185.81 : x
2. Step 2: Convert to fraction form
   764,335.38/1,054,796.23 = 420,185.81/x
3. Step 3: Cross multiply
   764,335.38x = 1,054,796.23 × 420,185.81
4. Step 4: Simplify right side
   764,335.38x = 443,210,410,259.83
5. Step 5: Solve for x
   x = 443,210,410,259.83/764,335.38
6. Step 6: Final answer
   x = 579,863.79