Finding the Fourth Proportional to 2,851.66, 3,931.50 and 2,560.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,851.66 : 3,931.50 = 2,560.06 : x
2. Step 2: Convert to fraction form
   2,851.66/3,931.50 = 2,560.06/x
3. Step 3: Cross multiply
   2,851.66x = 3,931.50 × 2,560.06
4. Step 4: Simplify right side
   2,851.66x = 10,064,875.89
5. Step 5: Solve for x
   x = 10,064,875.89/2,851.66
6. Step 6: Final answer
   x = 3,529.48