Finding the Fourth Proportional to 1,128.60, 1,554.98 and 843.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.60 : 1,554.98 = 843.83 : x
2. Step 2: Convert to fraction form
   1,128.60/1,554.98 = 843.83/x
3. Step 3: Cross multiply
   1,128.60x = 1,554.98 × 843.83
4. Step 4: Simplify right side
   1,128.60x = 1,312,126.78
5. Step 5: Solve for x
   x = 1,312,126.78/1,128.60
6. Step 6: Final answer
   x = 1,162.61