Finding the Fourth Proportional to 1,508.17, 2,259.31 and 1,039.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.17 : 2,259.31 = 1,039.56 : x
2. Step 2: Convert to fraction form
   1,508.17/2,259.31 = 1,039.56/x
3. Step 3: Cross multiply
   1,508.17x = 2,259.31 × 1,039.56
4. Step 4: Simplify right side
   1,508.17x = 2,348,688.30
5. Step 5: Solve for x
   x = 2,348,688.30/1,508.17
6. Step 6: Final answer
   x = 1,557.31