Finding the Fourth Proportional to 2,688.90, 3,710.52 and 1,509.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.90 : 3,710.52 = 1,509.72 : x
2. Step 2: Convert to fraction form
   2,688.90/3,710.52 = 1,509.72/x
3. Step 3: Cross multiply
   2,688.90x = 3,710.52 × 1,509.72
4. Step 4: Simplify right side
   2,688.90x = 5,601,846.25
5. Step 5: Solve for x
   x = 5,601,846.25/2,688.90
6. Step 6: Final answer
   x = 2,083.32