Finding the Fourth Proportional to 1,665.56, 2,298.44 and 919.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.56 : 2,298.44 = 919.55 : x
2. Step 2: Convert to fraction form
   1,665.56/2,298.44 = 919.55/x
3. Step 3: Cross multiply
   1,665.56x = 2,298.44 × 919.55
4. Step 4: Simplify right side
   1,665.56x = 2,113,514.41
5. Step 5: Solve for x
   x = 2,113,514.41/1,665.56
6. Step 6: Final answer
   x = 1,268.96