Finding the Fourth Proportional to 2,331.61, 3,216.89 and 1,323.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,331.61 : 3,216.89 = 1,323.15 : x
2. Step 2: Convert to fraction form
   2,331.61/3,216.89 = 1,323.15/x
3. Step 3: Cross multiply
   2,331.61x = 3,216.89 × 1,323.15
4. Step 4: Simplify right side
   2,331.61x = 4,256,428.00
5. Step 5: Solve for x
   x = 4,256,428.00/2,331.61
6. Step 6: Final answer
   x = 1,825.53