Finding the Fourth Proportional to 1,627.50, 2,245.68 and 919.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.50 : 2,245.68 = 919.38 : x
2. Step 2: Convert to fraction form
   1,627.50/2,245.68 = 919.38/x
3. Step 3: Cross multiply
   1,627.50x = 2,245.68 × 919.38
4. Step 4: Simplify right side
   1,627.50x = 2,064,633.28
5. Step 5: Solve for x
   x = 2,064,633.28/1,627.50
6. Step 6: Final answer
   x = 1,268.59