Finding the Fourth Proportional to 1,722.45, 2,377.86 and 1,165.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.45 : 2,377.86 = 1,165.86 : x
2. Step 2: Convert to fraction form
   1,722.45/2,377.86 = 1,165.86/x
3. Step 3: Cross multiply
   1,722.45x = 2,377.86 × 1,165.86
4. Step 4: Simplify right side
   1,722.45x = 2,772,251.86
5. Step 5: Solve for x
   x = 2,772,251.86/1,722.45
6. Step 6: Final answer
   x = 1,609.48