Finding the Fourth Proportional to 1,588.72, 2,378.82 and 1,039.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.72 : 2,378.82 = 1,039.54 : x
2. Step 2: Convert to fraction form
   1,588.72/2,378.82 = 1,039.54/x
3. Step 3: Cross multiply
   1,588.72x = 2,378.82 × 1,039.54
4. Step 4: Simplify right side
   1,588.72x = 2,472,878.54
5. Step 5: Solve for x
   x = 2,472,878.54/1,588.72
6. Step 6: Final answer
   x = 1,556.52