Finding the Fourth Proportional to 2,221.78, 3,065.49 and 1,512.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.78 : 3,065.49 = 1,512.34 : x
2. Step 2: Convert to fraction form
   2,221.78/3,065.49 = 1,512.34/x
3. Step 3: Cross multiply
   2,221.78x = 3,065.49 × 1,512.34
4. Step 4: Simplify right side
   2,221.78x = 4,636,063.15
5. Step 5: Solve for x
   x = 4,636,063.15/2,221.78
6. Step 6: Final answer
   x = 2,086.64