Finding the Fourth Proportional to 1,123.03, 1,684.55 and 546.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.03 : 1,684.55 = 546.31 : x
2. Step 2: Convert to fraction form
   1,123.03/1,684.55 = 546.31/x
3. Step 3: Cross multiply
   1,123.03x = 1,684.55 × 546.31
4. Step 4: Simplify right side
   1,123.03x = 920,283.78
5. Step 5: Solve for x
   x = 920,283.78/1,123.03
6. Step 6: Final answer
   x = 819.47