Finding the Fourth Proportional to 2,160.69, 2,981.76 and 1,276.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.69 : 2,981.76 = 1,276.94 : x
2. Step 2: Convert to fraction form
   2,160.69/2,981.76 = 1,276.94/x
3. Step 3: Cross multiply
   2,160.69x = 2,981.76 × 1,276.94
4. Step 4: Simplify right side
   2,160.69x = 3,807,513.71
5. Step 5: Solve for x
   x = 3,807,513.71/2,160.69
6. Step 6: Final answer
   x = 1,762.17