Finding the Fourth Proportional to 1,647.16, 2,272.86 and 948.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.16 : 2,272.86 = 948.58 : x
2. Step 2: Convert to fraction form
   1,647.16/2,272.86 = 948.58/x
3. Step 3: Cross multiply
   1,647.16x = 2,272.86 × 948.58
4. Step 4: Simplify right side
   1,647.16x = 2,155,989.54
5. Step 5: Solve for x
   x = 2,155,989.54/1,647.16
6. Step 6: Final answer
   x = 1,308.91