Finding the Fourth Proportional to 1,123.30, 1,676.64 and 1,054.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.30 : 1,676.64 = 1,054.05 : x
2. Step 2: Convert to fraction form
   1,123.30/1,676.64 = 1,054.05/x
3. Step 3: Cross multiply
   1,123.30x = 1,676.64 × 1,054.05
4. Step 4: Simplify right side
   1,123.30x = 1,767,257.27
5. Step 5: Solve for x
   x = 1,767,257.27/1,123.30
6. Step 6: Final answer
   x = 1,573.27