Finding the Fourth Proportional to 1,039.34, 1,556.31 and 1,008.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.34 : 1,556.31 = 1,008.56 : x
2. Step 2: Convert to fraction form
   1,039.34/1,556.31 = 1,008.56/x
3. Step 3: Cross multiply
   1,039.34x = 1,556.31 × 1,008.56
4. Step 4: Simplify right side
   1,039.34x = 1,569,632.01
5. Step 5: Solve for x
   x = 1,569,632.01/1,039.34
6. Step 6: Final answer
   x = 1,510.22