Finding the Fourth Proportional to 1,480.78, 2,219.20 and 1,152.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.78 : 2,219.20 = 1,152.12 : x
2. Step 2: Convert to fraction form
   1,480.78/2,219.20 = 1,152.12/x
3. Step 3: Cross multiply
   1,480.78x = 2,219.20 × 1,152.12
4. Step 4: Simplify right side
   1,480.78x = 2,556,790.15
5. Step 5: Solve for x
   x = 2,556,790.15/1,480.78
6. Step 6: Final answer
   x = 1,726.65