Finding the Fourth Proportional to 1,802.86, 2,485.69 and 1,172.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.86 : 2,485.69 = 1,172.49 : x
2. Step 2: Convert to fraction form
   1,802.86/2,485.69 = 1,172.49/x
3. Step 3: Cross multiply
   1,802.86x = 2,485.69 × 1,172.49
4. Step 4: Simplify right side
   1,802.86x = 2,914,446.67
5. Step 5: Solve for x
   x = 2,914,446.67/1,802.86
6. Step 6: Final answer
   x = 1,616.57