Finding the Fourth Proportional to 1,724.96, 2,379.20 and 1,061.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.96 : 2,379.20 = 1,061.57 : x
2. Step 2: Convert to fraction form
   1,724.96/2,379.20 = 1,061.57/x
3. Step 3: Cross multiply
   1,724.96x = 2,379.20 × 1,061.57
4. Step 4: Simplify right side
   1,724.96x = 2,525,687.98
5. Step 5: Solve for x
   x = 2,525,687.98/1,724.96
6. Step 6: Final answer
   x = 1,464.20