Finding the Fourth Proportional to 1,715.91, 2,561.43 and 1,508.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.91 : 2,561.43 = 1,508.31 : x
2. Step 2: Convert to fraction form
   1,715.91/2,561.43 = 1,508.31/x
3. Step 3: Cross multiply
   1,715.91x = 2,561.43 × 1,508.31
4. Step 4: Simplify right side
   1,715.91x = 3,863,430.48
5. Step 5: Solve for x
   x = 3,863,430.48/1,715.91
6. Step 6: Final answer
   x = 2,251.53