Finding the Fourth Proportional to 2,429.87, 3,645.45 and 870.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.87 : 3,645.45 = 870.03 : x
2. Step 2: Convert to fraction form
   2,429.87/3,645.45 = 870.03/x
3. Step 3: Cross multiply
   2,429.87x = 3,645.45 × 870.03
4. Step 4: Simplify right side
   2,429.87x = 3,171,650.86
5. Step 5: Solve for x
   x = 3,171,650.86/2,429.87
6. Step 6: Final answer
   x = 1,305.28