Finding the Fourth Proportional to 1,271.06, 1,907.52 and 578.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.06 : 1,907.52 = 578.52 : x
2. Step 2: Convert to fraction form
   1,271.06/1,907.52 = 578.52/x
3. Step 3: Cross multiply
   1,271.06x = 1,907.52 × 578.52
4. Step 4: Simplify right side
   1,271.06x = 1,103,538.47
5. Step 5: Solve for x
   x = 1,103,538.47/1,271.06
6. Step 6: Final answer
   x = 868.20