Finding the Fourth Proportional to 1,802.58, 2,487.17 and 1,056.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.58 : 2,487.17 = 1,056.42 : x
2. Step 2: Convert to fraction form
   1,802.58/2,487.17 = 1,056.42/x
3. Step 3: Cross multiply
   1,802.58x = 2,487.17 × 1,056.42
4. Step 4: Simplify right side
   1,802.58x = 2,627,490.85
5. Step 5: Solve for x
   x = 2,627,490.85/1,802.58
6. Step 6: Final answer
   x = 1,457.63