Finding the Fourth Proportional to 456,443.28, 683,483.94 and 405,662.76

Step by Step Solution

1. Step 1: Write the proportion equation
   456,443.28 : 683,483.94 = 405,662.76 : x
2. Step 2: Convert to fraction form
   456,443.28/683,483.94 = 405,662.76/x
3. Step 3: Cross multiply
   456,443.28x = 683,483.94 × 405,662.76
4. Step 4: Simplify right side
   456,443.28x = 277,263,981,516.07
5. Step 5: Solve for x
   x = 277,263,981,516.07/456,443.28
6. Step 6: Final answer
   x = 607,444.55