Finding the Fourth Proportional to 1,627.34, 2,245.71 and 928.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.34 : 2,245.71 = 928.70 : x
2. Step 2: Convert to fraction form
   1,627.34/2,245.71 = 928.70/x
3. Step 3: Cross multiply
   1,627.34x = 2,245.71 × 928.70
4. Step 4: Simplify right side
   1,627.34x = 2,085,590.88
5. Step 5: Solve for x
   x = 2,085,590.88/1,627.34
6. Step 6: Final answer
   x = 1,281.60