Finding the Fourth Proportional to 1,400.18, 2,100.83 and 578.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.18 : 2,100.83 = 578.27 : x
2. Step 2: Convert to fraction form
   1,400.18/2,100.83 = 578.27/x
3. Step 3: Cross multiply
   1,400.18x = 2,100.83 × 578.27
4. Step 4: Simplify right side
   1,400.18x = 1,214,833.57
5. Step 5: Solve for x
   x = 1,214,833.57/1,400.18
6. Step 6: Final answer
   x = 867.63