Finding the Fourth Proportional to 1,395.72, 2,083.77 and 1,152.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.72 : 2,083.77 = 1,152.72 : x
2. Step 2: Convert to fraction form
   1,395.72/2,083.77 = 1,152.72/x
3. Step 3: Cross multiply
   1,395.72x = 2,083.77 × 1,152.72
4. Step 4: Simplify right side
   1,395.72x = 2,402,003.35
5. Step 5: Solve for x
   x = 2,402,003.35/1,395.72
6. Step 6: Final answer
   x = 1,720.98