Finding the Fourth Proportional to 2,160.81, 2,981.94 and 1,264.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.81 : 2,981.94 = 1,264.34 : x
2. Step 2: Convert to fraction form
   2,160.81/2,981.94 = 1,264.34/x
3. Step 3: Cross multiply
   2,160.81x = 2,981.94 × 1,264.34
4. Step 4: Simplify right side
   2,160.81x = 3,770,179.17
5. Step 5: Solve for x
   x = 3,770,179.17/2,160.81
6. Step 6: Final answer
   x = 1,744.80