Finding the Fourth Proportional to 1,556.50, 2,147.98 and 857.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,556.50 : 2,147.98 = 857.92 : x
2. Step 2: Convert to fraction form
   1,556.50/2,147.98 = 857.92/x
3. Step 3: Cross multiply
   1,556.50x = 2,147.98 × 857.92
4. Step 4: Simplify right side
   1,556.50x = 1,842,795.00
5. Step 5: Solve for x
   x = 1,842,795.00/1,556.50
6. Step 6: Final answer
   x = 1,183.94