Finding the Fourth Proportional to 2,961.28, 4,086.88 and 1,783.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,961.28 : 4,086.88 = 1,783.04 : x
2. Step 2: Convert to fraction form
   2,961.28/4,086.88 = 1,783.04/x
3. Step 3: Cross multiply
   2,961.28x = 4,086.88 × 1,783.04
4. Step 4: Simplify right side
   2,961.28x = 7,287,070.52
5. Step 5: Solve for x
   x = 7,287,070.52/2,961.28
6. Step 6: Final answer
   x = 2,460.78