Finding the Fourth Proportional to 1,056.50, 1,585.39 and 448.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.50 : 1,585.39 = 448.50 : x
2. Step 2: Convert to fraction form
   1,056.50/1,585.39 = 448.50/x
3. Step 3: Cross multiply
   1,056.50x = 1,585.39 × 448.50
4. Step 4: Simplify right side
   1,056.50x = 711,047.42
5. Step 5: Solve for x
   x = 711,047.42/1,056.50
6. Step 6: Final answer
   x = 673.02