Finding the Fourth Proportional to 997,860.96, 1,496,789.82 and 287,892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   997,860.96 : 1,496,789.82 = 287,892.72 : x
2. Step 2: Convert to fraction form
   997,860.96/1,496,789.82 = 287,892.72/x
3. Step 3: Cross multiply
   997,860.96x = 1,496,789.82 × 287,892.72
4. Step 4: Simplify right side
   997,860.96x = 430,914,892,548.11
5. Step 5: Solve for x
   x = 430,914,892,548.11/997,860.96
6. Step 6: Final answer
   x = 431,838.61