Finding the Fourth Proportional to 1,770.89, 2,653.75 and 1,111.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.89 : 2,653.75 = 1,111.21 : x
2. Step 2: Convert to fraction form
   1,770.89/2,653.75 = 1,111.21/x
3. Step 3: Cross multiply
   1,770.89x = 2,653.75 × 1,111.21
4. Step 4: Simplify right side
   1,770.89x = 2,948,855.62
5. Step 5: Solve for x
   x = 2,948,855.62/1,770.89
6. Step 6: Final answer
   x = 1,665.18