Finding the Fourth Proportional to 2,607.82, 3,912.16 and 852.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.82 : 3,912.16 = 852.30 : x
2. Step 2: Convert to fraction form
   2,607.82/3,912.16 = 852.30/x
3. Step 3: Cross multiply
   2,607.82x = 3,912.16 × 852.30
4. Step 4: Simplify right side
   2,607.82x = 3,334,333.97
5. Step 5: Solve for x
   x = 3,334,333.97/2,607.82
6. Step 6: Final answer
   x = 1,278.59