Finding the Fourth Proportional to 1,354.69, 2,021.55 and 1,208.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.69 : 2,021.55 = 1,208.89 : x
2. Step 2: Convert to fraction form
   1,354.69/2,021.55 = 1,208.89/x
3. Step 3: Cross multiply
   1,354.69x = 2,021.55 × 1,208.89
4. Step 4: Simplify right side
   1,354.69x = 2,443,826.53
5. Step 5: Solve for x
   x = 2,443,826.53/1,354.69
6. Step 6: Final answer
   x = 1,803.98