Finding the Fourth Proportional to 2,321.29, 3,477.79 and 1,223.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,321.29 : 3,477.79 = 1,223.20 : x
2. Step 2: Convert to fraction form
   2,321.29/3,477.79 = 1,223.20/x
3. Step 3: Cross multiply
   2,321.29x = 3,477.79 × 1,223.20
4. Step 4: Simplify right side
   2,321.29x = 4,254,031.72
5. Step 5: Solve for x
   x = 4,254,031.72/2,321.29
6. Step 6: Final answer
   x = 1,832.61