Finding the Fourth Proportional to 2,688.45, 3,709.98 and 1,509.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.45 : 3,709.98 = 1,509.72 : x
2. Step 2: Convert to fraction form
   2,688.45/3,709.98 = 1,509.72/x
3. Step 3: Cross multiply
   2,688.45x = 3,709.98 × 1,509.72
4. Step 4: Simplify right side
   2,688.45x = 5,601,031.01
5. Step 5: Solve for x
   x = 5,601,031.01/2,688.45
6. Step 6: Final answer
   x = 2,083.37