Finding the Fourth Proportional to 886,903.59, 1,329,513.69 and 287,443.53

Step by Step Solution

1. Step 1: Write the proportion equation
   886,903.59 : 1,329,513.69 = 287,443.53 : x
2. Step 2: Convert to fraction form
   886,903.59/1,329,513.69 = 287,443.53/x
3. Step 3: Cross multiply
   886,903.59x = 1,329,513.69 × 287,443.53
4. Step 4: Simplify right side
   886,903.59x = 382,160,108,236.93
5. Step 5: Solve for x
   x = 382,160,108,236.93/886,903.59
6. Step 6: Final answer
   x = 430,892.50