Finding the Fourth Proportional to 2,790.72, 4,184.49 and 1,148.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.72 : 4,184.49 = 1,148.40 : x
2. Step 2: Convert to fraction form
   2,790.72/4,184.49 = 1,148.40/x
3. Step 3: Cross multiply
   2,790.72x = 4,184.49 × 1,148.40
4. Step 4: Simplify right side
   2,790.72x = 4,805,468.32
5. Step 5: Solve for x
   x = 4,805,468.32/2,790.72
6. Step 6: Final answer
   x = 1,721.95