Finding the Fourth Proportional to 764,443.51, 1,054,932.73 and 420,285.31

Step by Step Solution

1. Step 1: Write the proportion equation
   764,443.51 : 1,054,932.73 = 420,285.31 : x
2. Step 2: Convert to fraction form
   764,443.51/1,054,932.73 = 420,285.31/x
3. Step 3: Cross multiply
   764,443.51x = 1,054,932.73 × 420,285.31
4. Step 4: Simplify right side
   764,443.51x = 443,372,725,769.15
5. Step 5: Solve for x
   x = 443,372,725,769.15/764,443.51
6. Step 6: Final answer
   x = 579,994.10