Finding the Fourth Proportional to 1,721.53, 2,376.89 and 1,162.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.53 : 2,376.89 = 1,162.78 : x
2. Step 2: Convert to fraction form
   1,721.53/2,376.89 = 1,162.78/x
3. Step 3: Cross multiply
   1,721.53x = 2,376.89 × 1,162.78
4. Step 4: Simplify right side
   1,721.53x = 2,763,794.34
5. Step 5: Solve for x
   x = 2,763,794.34/1,721.53
6. Step 6: Final answer
   x = 1,605.43