Finding the Fourth Proportional to 1,490.04, 2,056.23 and 860.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.04 : 2,056.23 = 860.56 : x
2. Step 2: Convert to fraction form
   1,490.04/2,056.23 = 860.56/x
3. Step 3: Cross multiply
   1,490.04x = 2,056.23 × 860.56
4. Step 4: Simplify right side
   1,490.04x = 1,769,504.15
5. Step 5: Solve for x
   x = 1,769,504.15/1,490.04
6. Step 6: Final answer
   x = 1,187.55