Finding the Fourth Proportional to 1,050.78, 1,450.01 and 578.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.78 : 1,450.01 = 578.59 : x
2. Step 2: Convert to fraction form
   1,050.78/1,450.01 = 578.59/x
3. Step 3: Cross multiply
   1,050.78x = 1,450.01 × 578.59
4. Step 4: Simplify right side
   1,050.78x = 838,959.11
5. Step 5: Solve for x
   x = 838,959.11/1,050.78
6. Step 6: Final answer
   x = 798.42