Finding the Fourth Proportional to 2,010.61, 3,011.53 and 1,228.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.61 : 3,011.53 = 1,228.25 : x
2. Step 2: Convert to fraction form
   2,010.61/3,011.53 = 1,228.25/x
3. Step 3: Cross multiply
   2,010.61x = 3,011.53 × 1,228.25
4. Step 4: Simplify right side
   2,010.61x = 3,698,911.72
5. Step 5: Solve for x
   x = 3,698,911.72/2,010.61
6. Step 6: Final answer
   x = 1,839.70