Finding the Fourth Proportional to 3,861.32, 5,794.78 and 1,780.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861.32 : 5,794.78 = 1,780.04 : x
2. Step 2: Convert to fraction form
   3,861.32/5,794.78 = 1,780.04/x
3. Step 3: Cross multiply
   3,861.32x = 5,794.78 × 1,780.04
4. Step 4: Simplify right side
   3,861.32x = 10,314,940.19
5. Step 5: Solve for x
   x = 10,314,940.19/3,861.32
6. Step 6: Final answer
   x = 2,671.35