Finding the Fourth Proportional to 886,282.38, 1,329,144.72 and 287,104.53

Step by Step Solution

1. Step 1: Write the proportion equation
   886,282.38 : 1,329,144.72 = 287,104.53 : x
2. Step 2: Convert to fraction form
   886,282.38/1,329,144.72 = 287,104.53/x
3. Step 3: Cross multiply
   886,282.38x = 1,329,144.72 × 287,104.53
4. Step 4: Simplify right side
   886,282.38x = 381,603,463,491.86
5. Step 5: Solve for x
   x = 381,603,463,491.86/886,282.38
6. Step 6: Final answer
   x = 430,566.45