Finding the Fourth Proportional to 1,118.00, 1,542.83 and 620.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.00 : 1,542.83 = 620.71 : x
2. Step 2: Convert to fraction form
   1,118.00/1,542.83 = 620.71/x
3. Step 3: Cross multiply
   1,118.00x = 1,542.83 × 620.71
4. Step 4: Simplify right side
   1,118.00x = 957,642.30
5. Step 5: Solve for x
   x = 957,642.30/1,118.00
6. Step 6: Final answer
   x = 856.57