Finding the Fourth Proportional to 1,123.79, 1,685.69 and 474.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.79 : 1,685.69 = 474.17 : x
2. Step 2: Convert to fraction form
   1,123.79/1,685.69 = 474.17/x
3. Step 3: Cross multiply
   1,123.79x = 1,685.69 × 474.17
4. Step 4: Simplify right side
   1,123.79x = 799,301.26
5. Step 5: Solve for x
   x = 799,301.26/1,123.79
6. Step 6: Final answer
   x = 711.26