Finding the Fourth Proportional to 459,300.35, 689,061.18 and 451,674.60

Step by Step Solution

1. Step 1: Write the proportion equation
   459,300.35 : 689,061.18 = 451,674.60 : x
2. Step 2: Convert to fraction form
   459,300.35/689,061.18 = 451,674.60/x
3. Step 3: Cross multiply
   459,300.35x = 689,061.18 × 451,674.60
4. Step 4: Simplify right side
   459,300.35x = 311,231,432,852.03
5. Step 5: Solve for x
   x = 311,231,432,852.03/459,300.35
6. Step 6: Final answer
   x = 677,620.73