Finding the Fourth Proportional to 2,160.17, 2,980.77 and 1,363.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.17 : 2,980.77 = 1,363.20 : x
2. Step 2: Convert to fraction form
   2,160.17/2,980.77 = 1,363.20/x
3. Step 3: Cross multiply
   2,160.17x = 2,980.77 × 1,363.20
4. Step 4: Simplify right side
   2,160.17x = 4,063,363.94
5. Step 5: Solve for x
   x = 4,063,363.94/2,160.17
6. Step 6: Final answer
   x = 1,881.04