Finding the Fourth Proportional to 1,739.72, 2,398.79 and 1,180.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,739.72 : 2,398.79 = 1,180.55 : x
2. Step 2: Convert to fraction form
   1,739.72/2,398.79 = 1,180.55/x
3. Step 3: Cross multiply
   1,739.72x = 2,398.79 × 1,180.55
4. Step 4: Simplify right side
   1,739.72x = 2,831,891.53
5. Step 5: Solve for x
   x = 2,831,891.53/1,739.72
6. Step 6: Final answer
   x = 1,627.79