Finding the Fourth Proportional to 3,275.78, 4,915.69 and 1,328.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,275.78 : 4,915.69 = 1,328.00 : x
2. Step 2: Convert to fraction form
   3,275.78/4,915.69 = 1,328.00/x
3. Step 3: Cross multiply
   3,275.78x = 4,915.69 × 1,328.00
4. Step 4: Simplify right side
   3,275.78x = 6,528,008.42
5. Step 5: Solve for x
   x = 6,528,008.42/3,275.78
6. Step 6: Final answer
   x = 1,992.81