Finding the Fourth Proportional to 2,643.53, 3,957.74 and 1,776.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.53 : 3,957.74 = 1,776.29 : x
2. Step 2: Convert to fraction form
   2,643.53/3,957.74 = 1,776.29/x
3. Step 3: Cross multiply
   2,643.53x = 3,957.74 × 1,776.29
4. Step 4: Simplify right side
   2,643.53x = 7,030,085.10
5. Step 5: Solve for x
   x = 7,030,085.10/2,643.53
6. Step 6: Final answer
   x = 2,659.36