Finding the Fourth Proportional to 2,094.20, 3,138.59 and 860.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,094.20 : 3,138.59 = 860.15 : x
2. Step 2: Convert to fraction form
   2,094.20/3,138.59 = 860.15/x
3. Step 3: Cross multiply
   2,094.20x = 3,138.59 × 860.15
4. Step 4: Simplify right side
   2,094.20x = 2,699,653.89
5. Step 5: Solve for x
   x = 2,699,653.89/2,094.20
6. Step 6: Final answer
   x = 1,289.11