Finding the Fourth Proportional to 1,627.39, 2,245.86 and 928.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.39 : 2,245.86 = 928.75 : x
2. Step 2: Convert to fraction form
   1,627.39/2,245.86 = 928.75/x
3. Step 3: Cross multiply
   1,627.39x = 2,245.86 × 928.75
4. Step 4: Simplify right side
   1,627.39x = 2,085,842.48
5. Step 5: Solve for x
   x = 2,085,842.48/1,627.39
6. Step 6: Final answer
   x = 1,281.71