Finding the Fourth Proportional to 1,065.50, 1,597.23 and 545.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.50 : 1,597.23 = 545.30 : x
2. Step 2: Convert to fraction form
   1,065.50/1,597.23 = 545.30/x
3. Step 3: Cross multiply
   1,065.50x = 1,597.23 × 545.30
4. Step 4: Simplify right side
   1,065.50x = 870,969.52
5. Step 5: Solve for x
   x = 870,969.52/1,065.50
6. Step 6: Final answer
   x = 817.43