Finding the Fourth Proportional to 1,123.43, 1,676.83 and 1,054.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.43 : 1,676.83 = 1,054.17 : x
2. Step 2: Convert to fraction form
   1,123.43/1,676.83 = 1,054.17/x
3. Step 3: Cross multiply
   1,123.43x = 1,676.83 × 1,054.17
4. Step 4: Simplify right side
   1,123.43x = 1,767,664.90
5. Step 5: Solve for x
   x = 1,767,664.90/1,123.43
6. Step 6: Final answer
   x = 1,573.46