Finding the Fourth Proportional to 1,050.59, 1,449.81 and 578.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.59 : 1,449.81 = 578.50 : x
2. Step 2: Convert to fraction form
   1,050.59/1,449.81 = 578.50/x
3. Step 3: Cross multiply
   1,050.59x = 1,449.81 × 578.50
4. Step 4: Simplify right side
   1,050.59x = 838,715.09
5. Step 5: Solve for x
   x = 838,715.09/1,050.59
6. Step 6: Final answer
   x = 798.33