Finding the Fourth Proportional to 1,627.34, 2,245.55 and 919.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.34 : 2,245.55 = 919.12 : x
2. Step 2: Convert to fraction form
   1,627.34/2,245.55 = 919.12/x
3. Step 3: Cross multiply
   1,627.34x = 2,245.55 × 919.12
4. Step 4: Simplify right side
   1,627.34x = 2,063,929.92
5. Step 5: Solve for x
   x = 2,063,929.92/1,627.34
6. Step 6: Final answer
   x = 1,268.28