Finding the Fourth Proportional to 2,160.86, 2,981.50 and 1,276.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.86 : 2,981.50 = 1,276.19 : x
2. Step 2: Convert to fraction form
   2,160.86/2,981.50 = 1,276.19/x
3. Step 3: Cross multiply
   2,160.86x = 2,981.50 × 1,276.19
4. Step 4: Simplify right side
   2,160.86x = 3,804,960.49
5. Step 5: Solve for x
   x = 3,804,960.49/2,160.86
6. Step 6: Final answer
   x = 1,760.85