Finding the Fourth Proportional to 1,647.18, 2,272.77 and 948.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.18 : 2,272.77 = 948.42 : x
2. Step 2: Convert to fraction form
   1,647.18/2,272.77 = 948.42/x
3. Step 3: Cross multiply
   1,647.18x = 2,272.77 × 948.42
4. Step 4: Simplify right side
   1,647.18x = 2,155,540.52
5. Step 5: Solve for x
   x = 2,155,540.52/1,647.18
6. Step 6: Final answer
   x = 1,308.62