Finding the Fourth Proportional to 2,380.32, 3,570.12 and 919.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.32 : 3,570.12 = 919.29 : x
2. Step 2: Convert to fraction form
   2,380.32/3,570.12 = 919.29/x
3. Step 3: Cross multiply
   2,380.32x = 3,570.12 × 919.29
4. Step 4: Simplify right side
   2,380.32x = 3,281,975.61
5. Step 5: Solve for x
   x = 3,281,975.61/2,380.32
6. Step 6: Final answer
   x = 1,378.80