Finding the Fourth Proportional to 2,802.67, 4,201.71 and 1,321.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,802.67 : 4,201.71 = 1,321.18 : x
2. Step 2: Convert to fraction form
   2,802.67/4,201.71 = 1,321.18/x
3. Step 3: Cross multiply
   2,802.67x = 4,201.71 × 1,321.18
4. Step 4: Simplify right side
   2,802.67x = 5,551,199.76
5. Step 5: Solve for x
   x = 5,551,199.76/2,802.67
6. Step 6: Final answer
   x = 1,980.68