Finding the Fourth Proportional to 1,123.32, 1,684.98 and 474.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.32 : 1,684.98 = 474.78 : x
2. Step 2: Convert to fraction form
   1,123.32/1,684.98 = 474.78/x
3. Step 3: Cross multiply
   1,123.32x = 1,684.98 × 474.78
4. Step 4: Simplify right side
   1,123.32x = 799,994.80
5. Step 5: Solve for x
   x = 799,994.80/1,123.32
6. Step 6: Final answer
   x = 712.17