Finding the Fourth Proportional to 1,513.61, 2,274.46 and 1,323.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.61 : 2,274.46 = 1,323.12 : x
2. Step 2: Convert to fraction form
   1,513.61/2,274.46 = 1,323.12/x
3. Step 3: Cross multiply
   1,513.61x = 2,274.46 × 1,323.12
4. Step 4: Simplify right side
   1,513.61x = 3,009,380.21
5. Step 5: Solve for x
   x = 3,009,380.21/1,513.61
6. Step 6: Final answer
   x = 1,988.22