Finding the Fourth Proportional to 2,588.72, 3,572.40 and 1,409.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,588.72 : 3,572.40 = 1,409.78 : x
2. Step 2: Convert to fraction form
   2,588.72/3,572.40 = 1,409.78/x
3. Step 3: Cross multiply
   2,588.72x = 3,572.40 × 1,409.78
4. Step 4: Simplify right side
   2,588.72x = 5,036,298.07
5. Step 5: Solve for x
   x = 5,036,298.07/2,588.72
6. Step 6: Final answer
   x = 1,945.48