Finding the Fourth Proportional to 1,050.42, 1,449.56 and 578.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.42 : 1,449.56 = 578.34 : x
2. Step 2: Convert to fraction form
   1,050.42/1,449.56 = 578.34/x
3. Step 3: Cross multiply
   1,050.42x = 1,449.56 × 578.34
4. Step 4: Simplify right side
   1,050.42x = 838,339.98
5. Step 5: Solve for x
   x = 838,339.98/1,050.42
6. Step 6: Final answer
   x = 798.10