Finding the Fourth Proportional to 1,065.87, 1,597.35 and 544.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.87 : 1,597.35 = 544.78 : x
2. Step 2: Convert to fraction form
   1,065.87/1,597.35 = 544.78/x
3. Step 3: Cross multiply
   1,065.87x = 1,597.35 × 544.78
4. Step 4: Simplify right side
   1,065.87x = 870,200.34
5. Step 5: Solve for x
   x = 870,200.34/1,065.87
6. Step 6: Final answer
   x = 816.42