Finding the Fourth Proportional to 2,145.56, 2,959.88 and 1,260.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.56 : 2,959.88 = 1,260.77 : x
2. Step 2: Convert to fraction form
   2,145.56/2,959.88 = 1,260.77/x
3. Step 3: Cross multiply
   2,145.56x = 2,959.88 × 1,260.77
4. Step 4: Simplify right side
   2,145.56x = 3,731,706.80
5. Step 5: Solve for x
   x = 3,731,706.80/2,145.56
6. Step 6: Final answer
   x = 1,739.27