Finding the Fourth Proportional to 3,870.88, 5,342.12 and 2,378.44

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.88 : 5,342.12 = 2,378.44 : x
2. Step 2: Convert to fraction form
   3,870.88/5,342.12 = 2,378.44/x
3. Step 3: Cross multiply
   3,870.88x = 5,342.12 × 2,378.44
4. Step 4: Simplify right side
   3,870.88x = 12,705,911.89
5. Step 5: Solve for x
   x = 12,705,911.89/3,870.88
6. Step 6: Final answer
   x = 3,282.43