Finding the Fourth Proportional to 2,161.76, 3,243.58 and 1,007.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,161.76 : 3,243.58 = 1,007.52 : x
2. Step 2: Convert to fraction form
   2,161.76/3,243.58 = 1,007.52/x
3. Step 3: Cross multiply
   2,161.76x = 3,243.58 × 1,007.52
4. Step 4: Simplify right side
   2,161.76x = 3,267,971.72
5. Step 5: Solve for x
   x = 3,267,971.72/2,161.76
6. Step 6: Final answer
   x = 1,511.72