Finding the Fourth Proportional to 2,160.12, 2,981.34 and 1,275.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.12 : 2,981.34 = 1,275.96 : x
2. Step 2: Convert to fraction form
   2,160.12/2,981.34 = 1,275.96/x
3. Step 3: Cross multiply
   2,160.12x = 2,981.34 × 1,275.96
4. Step 4: Simplify right side
   2,160.12x = 3,804,070.59
5. Step 5: Solve for x
   x = 3,804,070.59/2,160.12
6. Step 6: Final answer
   x = 1,761.05