Finding the Fourth Proportional to 1,627.08, 2,245.20 and 918.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.08 : 2,245.20 = 918.69 : x
2. Step 2: Convert to fraction form
   1,627.08/2,245.20 = 918.69/x
3. Step 3: Cross multiply
   1,627.08x = 2,245.20 × 918.69
4. Step 4: Simplify right side
   1,627.08x = 2,062,642.79
5. Step 5: Solve for x
   x = 2,062,642.79/1,627.08
6. Step 6: Final answer
   x = 1,267.70