Finding the Fourth Proportional to 764,705.63, 1,055,320.83 and 420,568.16

Step by Step Solution

1. Step 1: Write the proportion equation
   764,705.63 : 1,055,320.83 = 420,568.16 : x
2. Step 2: Convert to fraction form
   764,705.63/1,055,320.83 = 420,568.16/x
3. Step 3: Cross multiply
   764,705.63x = 1,055,320.83 × 420,568.16
4. Step 4: Simplify right side
   764,705.63x = 443,834,334,406.17
5. Step 5: Solve for x
   x = 443,834,334,406.17/764,705.63
6. Step 6: Final answer
   x = 580,398.94