Finding the Fourth Proportional to 2,399.32, 3,595.34 and 1,780.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.32 : 3,595.34 = 1,780.13 : x
2. Step 2: Convert to fraction form
   2,399.32/3,595.34 = 1,780.13/x
3. Step 3: Cross multiply
   2,399.32x = 3,595.34 × 1,780.13
4. Step 4: Simplify right side
   2,399.32x = 6,400,155.80
5. Step 5: Solve for x
   x = 6,400,155.80/2,399.32
6. Step 6: Final answer
   x = 2,667.49