Finding the Fourth Proportional to 2,212.31, 3,053.14 and 1,280.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.31 : 3,053.14 = 1,280.81 : x
2. Step 2: Convert to fraction form
   2,212.31/3,053.14 = 1,280.81/x
3. Step 3: Cross multiply
   2,212.31x = 3,053.14 × 1,280.81
4. Step 4: Simplify right side
   2,212.31x = 3,910,496.67
5. Step 5: Solve for x
   x = 3,910,496.67/2,212.31
6. Step 6: Final answer
   x = 1,767.61