Finding the Fourth Proportional to 1,802.24, 2,487.05 and 1,005.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.24 : 2,487.05 = 1,005.58 : x
2. Step 2: Convert to fraction form
   1,802.24/2,487.05 = 1,005.58/x
3. Step 3: Cross multiply
   1,802.24x = 2,487.05 × 1,005.58
4. Step 4: Simplify right side
   1,802.24x = 2,500,915.30
5. Step 5: Solve for x
   x = 2,500,915.30/1,802.24
6. Step 6: Final answer
   x = 1,387.67