Finding the Fourth Proportional to 2,108.52, 2,910.20 and 1,321.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.52 : 2,910.20 = 1,321.20 : x
2. Step 2: Convert to fraction form
   2,108.52/2,910.20 = 1,321.20/x
3. Step 3: Cross multiply
   2,108.52x = 2,910.20 × 1,321.20
4. Step 4: Simplify right side
   2,108.52x = 3,844,949.63
5. Step 5: Solve for x
   x = 3,844,949.63/2,108.52
6. Step 6: Final answer
   x = 1,823.53