Finding the Fourth Proportional to 3,852.45, 5,778.72 and 1,219.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,852.45 : 5,778.72 = 1,219.91 : x
2. Step 2: Convert to fraction form
   3,852.45/5,778.72 = 1,219.91/x
3. Step 3: Cross multiply
   3,852.45x = 5,778.72 × 1,219.91
4. Step 4: Simplify right side
   3,852.45x = 7,049,518.50
5. Step 5: Solve for x
   x = 7,049,518.50/3,852.45
6. Step 6: Final answer
   x = 1,829.88