Finding the Fourth Proportional to 828,705.05, 1,243,081.60 and 323,245.61

Step by Step Solution

1. Step 1: Write the proportion equation
   828,705.05 : 1,243,081.60 = 323,245.61 : x
2. Step 2: Convert to fraction form
   828,705.05/1,243,081.60 = 323,245.61/x
3. Step 3: Cross multiply
   828,705.05x = 1,243,081.60 × 323,245.61
4. Step 4: Simplify right side
   828,705.05x = 401,820,663,048.25
5. Step 5: Solve for x
   x = 401,820,663,048.25/828,705.05
6. Step 6: Final answer
   x = 484,877.78