Finding the Fourth Proportional to 778,476.81, 1,074,273.64 and 456,401.42

Step by Step Solution

1. Step 1: Write the proportion equation
   778,476.81 : 1,074,273.64 = 456,401.42 : x
2. Step 2: Convert to fraction form
   778,476.81/1,074,273.64 = 456,401.42/x
3. Step 3: Cross multiply
   778,476.81x = 1,074,273.64 × 456,401.42
4. Step 4: Simplify right side
   778,476.81x = 490,300,012,280.72
5. Step 5: Solve for x
   x = 490,300,012,280.72/778,476.81
6. Step 6: Final answer
   x = 629,819.68