Finding the Fourth Proportional to 2,010.91, 2,775.54 and 1,225.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.91 : 2,775.54 = 1,225.61 : x
2. Step 2: Convert to fraction form
   2,010.91/2,775.54 = 1,225.61/x
3. Step 3: Cross multiply
   2,010.91x = 2,775.54 × 1,225.61
4. Step 4: Simplify right side
   2,010.91x = 3,401,729.58
5. Step 5: Solve for x
   x = 3,401,729.58/2,010.91
6. Step 6: Final answer
   x = 1,691.64