Finding the Fourth Proportional to 1,881.76, 2,819.56 and 1,149.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,881.76 : 2,819.56 = 1,149.12 : x
2. Step 2: Convert to fraction form
   1,881.76/2,819.56 = 1,149.12/x
3. Step 3: Cross multiply
   1,881.76x = 2,819.56 × 1,149.12
4. Step 4: Simplify right side
   1,881.76x = 3,240,012.79
5. Step 5: Solve for x
   x = 3,240,012.79/1,881.76
6. Step 6: Final answer
   x = 1,721.80