Finding the Fourth Proportional to 2,611.53, 3,915.72 and 1,028.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.53 : 3,915.72 = 1,028.36 : x
2. Step 2: Convert to fraction form
   2,611.53/3,915.72 = 1,028.36/x
3. Step 3: Cross multiply
   2,611.53x = 3,915.72 × 1,028.36
4. Step 4: Simplify right side
   2,611.53x = 4,026,769.82
5. Step 5: Solve for x
   x = 4,026,769.82/2,611.53
6. Step 6: Final answer
   x = 1,541.92