Finding the Fourth Proportional to 2,659.59, 3,985.61 and 1,960.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.59 : 3,985.61 = 1,960.76 : x
2. Step 2: Convert to fraction form
   2,659.59/3,985.61 = 1,960.76/x
3. Step 3: Cross multiply
   2,659.59x = 3,985.61 × 1,960.76
4. Step 4: Simplify right side
   2,659.59x = 7,814,824.82
5. Step 5: Solve for x
   x = 7,814,824.82/2,659.59
6. Step 6: Final answer
   x = 2,938.36