Finding the Fourth Proportional to 1,521.50, 2,279.68 and 1,324.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.50 : 2,279.68 = 1,324.30 : x
2. Step 2: Convert to fraction form
   1,521.50/2,279.68 = 1,324.30/x
3. Step 3: Cross multiply
   1,521.50x = 2,279.68 × 1,324.30
4. Step 4: Simplify right side
   1,521.50x = 3,018,980.22
5. Step 5: Solve for x
   x = 3,018,980.22/1,521.50
6. Step 6: Final answer
   x = 1,984.21