Finding the Fourth Proportional to 2,688.72, 3,710.50 and 1,509.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.72 : 3,710.50 = 1,509.88 : x
2. Step 2: Convert to fraction form
   2,688.72/3,710.50 = 1,509.88/x
3. Step 3: Cross multiply
   2,688.72x = 3,710.50 × 1,509.88
4. Step 4: Simplify right side
   2,688.72x = 5,602,409.74
5. Step 5: Solve for x
   x = 5,602,409.74/2,688.72
6. Step 6: Final answer
   x = 2,083.67