Finding the Fourth Proportional to 1,865.23, 2,574.89 and 1,079.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.23 : 2,574.89 = 1,079.12 : x
2. Step 2: Convert to fraction form
   1,865.23/2,574.89 = 1,079.12/x
3. Step 3: Cross multiply
   1,865.23x = 2,574.89 × 1,079.12
4. Step 4: Simplify right side
   1,865.23x = 2,778,620.39
5. Step 5: Solve for x
   x = 2,778,620.39/1,865.23
6. Step 6: Final answer
   x = 1,489.70