Finding the Fourth Proportional to 2,010.79, 3,016.15 and 1,220.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.79 : 3,016.15 = 1,220.34 : x
2. Step 2: Convert to fraction form
   2,010.79/3,016.15 = 1,220.34/x
3. Step 3: Cross multiply
   2,010.79x = 3,016.15 × 1,220.34
4. Step 4: Simplify right side
   2,010.79x = 3,680,728.49
5. Step 5: Solve for x
   x = 3,680,728.49/2,010.79
6. Step 6: Final answer
   x = 1,830.49