Finding the Fourth Proportional to 1,627.60, 2,245.98 and 928.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.60 : 2,245.98 = 928.96 : x
2. Step 2: Convert to fraction form
   1,627.60/2,245.98 = 928.96/x
3. Step 3: Cross multiply
   1,627.60x = 2,245.98 × 928.96
4. Step 4: Simplify right side
   1,627.60x = 2,086,425.58
5. Step 5: Solve for x
   x = 2,086,425.58/1,627.60
6. Step 6: Final answer
   x = 1,281.90