Finding the Fourth Proportional to 1,086,363.30, 1,629,607.18 and 287,624.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,363.30 : 1,629,607.18 = 287,624.06 : x
2. Step 2: Convert to fraction form
   1,086,363.30/1,629,607.18 = 287,624.06/x
3. Step 3: Cross multiply
   1,086,363.30x = 1,629,607.18 × 287,624.06
4. Step 4: Simplify right side
   1,086,363.30x = 468,714,225,168.72
5. Step 5: Solve for x
   x = 468,714,225,168.72/1,086,363.30
6. Step 6: Final answer
   x = 431,452.56