Finding the Fourth Proportional to 3,516.89, 5,272.23 and 1,325.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,516.89 : 5,272.23 = 1,325.72 : x
2. Step 2: Convert to fraction form
   3,516.89/5,272.23 = 1,325.72/x
3. Step 3: Cross multiply
   3,516.89x = 5,272.23 × 1,325.72
4. Step 4: Simplify right side
   3,516.89x = 6,989,500.76
5. Step 5: Solve for x
   x = 6,989,500.76/3,516.89
6. Step 6: Final answer
   x = 1,987.41