Finding the Fourth Proportional to 1,802.13, 2,487.15 and 1,242.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.13 : 2,487.15 = 1,242.42 : x
2. Step 2: Convert to fraction form
   1,802.13/2,487.15 = 1,242.42/x
3. Step 3: Cross multiply
   1,802.13x = 2,487.15 × 1,242.42
4. Step 4: Simplify right side
   1,802.13x = 3,090,084.90
5. Step 5: Solve for x
   x = 3,090,084.90/1,802.13
6. Step 6: Final answer
   x = 1,714.68