Finding the Fourth Proportional to 1,490.08, 2,056.41 and 860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.08 : 2,056.41 = 860.72 : x
2. Step 2: Convert to fraction form
   1,490.08/2,056.41 = 860.72/x
3. Step 3: Cross multiply
   1,490.08x = 2,056.41 × 860.72
4. Step 4: Simplify right side
   1,490.08x = 1,769,993.22
5. Step 5: Solve for x
   x = 1,769,993.22/1,490.08
6. Step 6: Final answer
   x = 1,187.85