Finding the Fourth Proportional to 2,688.72, 3,713.25 and 1,851.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.72 : 3,713.25 = 1,851.59 : x
2. Step 2: Convert to fraction form
   2,688.72/3,713.25 = 1,851.59/x
3. Step 3: Cross multiply
   2,688.72x = 3,713.25 × 1,851.59
4. Step 4: Simplify right side
   2,688.72x = 6,875,416.57
5. Step 5: Solve for x
   x = 6,875,416.57/2,688.72
6. Step 6: Final answer
   x = 2,557.13