Finding the Fourth Proportional to 1,123.63, 1,685.45 and 474.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.63 : 1,685.45 = 474.82 : x
2. Step 2: Convert to fraction form
   1,123.63/1,685.45 = 474.82/x
3. Step 3: Cross multiply
   1,123.63x = 1,685.45 × 474.82
4. Step 4: Simplify right side
   1,123.63x = 800,282.34
5. Step 5: Solve for x
   x = 800,282.34/1,123.63
6. Step 6: Final answer
   x = 712.23