Finding the Fourth Proportional to 3,780.47, 5,667.16 and 2,389.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.47 : 5,667.16 = 2,389.79 : x
2. Step 2: Convert to fraction form
   3,780.47/5,667.16 = 2,389.79/x
3. Step 3: Cross multiply
   3,780.47x = 5,667.16 × 2,389.79
4. Step 4: Simplify right side
   3,780.47x = 13,543,322.30
5. Step 5: Solve for x
   x = 13,543,322.30/3,780.47
6. Step 6: Final answer
   x = 3,582.44