Finding the Fourth Proportional to 2,806.91, 4,212.45 and 1,053.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,806.91 : 4,212.45 = 1,053.53 : x
2. Step 2: Convert to fraction form
   2,806.91/4,212.45 = 1,053.53/x
3. Step 3: Cross multiply
   2,806.91x = 4,212.45 × 1,053.53
4. Step 4: Simplify right side
   2,806.91x = 4,437,921.39
5. Step 5: Solve for x
   x = 4,437,921.39/2,806.91
6. Step 6: Final answer
   x = 1,581.07