Finding the Fourth Proportional to 3,778.88, 5,667.18 and 1,587.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,778.88 : 5,667.18 = 1,587.12 : x
2. Step 2: Convert to fraction form
   3,778.88/5,667.18 = 1,587.12/x
3. Step 3: Cross multiply
   3,778.88x = 5,667.18 × 1,587.12
4. Step 4: Simplify right side
   3,778.88x = 8,994,485.69
5. Step 5: Solve for x
   x = 8,994,485.69/3,778.88
6. Step 6: Final answer
   x = 2,380.20