Finding the Fourth Proportional to 2,610.19, 3,915.71 and 854.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.19 : 3,915.71 = 854.69 : x
2. Step 2: Convert to fraction form
   2,610.19/3,915.71 = 854.69/x
3. Step 3: Cross multiply
   2,610.19x = 3,915.71 × 854.69
4. Step 4: Simplify right side
   2,610.19x = 3,346,697.53
5. Step 5: Solve for x
   x = 3,346,697.53/2,610.19
6. Step 6: Final answer
   x = 1,282.17