Finding the Fourth Proportional to 743,064.35, 1,114,245.17 and 287,868.83

Step by Step Solution

1. Step 1: Write the proportion equation
   743,064.35 : 1,114,245.17 = 287,868.83 : x
2. Step 2: Convert to fraction form
   743,064.35/1,114,245.17 = 287,868.83/x
3. Step 3: Cross multiply
   743,064.35x = 1,114,245.17 × 287,868.83
4. Step 4: Simplify right side
   743,064.35x = 320,756,451,981.71
5. Step 5: Solve for x
   x = 320,756,451,981.71/743,064.35
6. Step 6: Final answer
   x = 431,667.13