Finding the Fourth Proportional to 2,810.50, 4,215.78 and 1,080.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.50 : 4,215.78 = 1,080.34 : x
2. Step 2: Convert to fraction form
   2,810.50/4,215.78 = 1,080.34/x
3. Step 3: Cross multiply
   2,810.50x = 4,215.78 × 1,080.34
4. Step 4: Simplify right side
   2,810.50x = 4,554,475.77
5. Step 5: Solve for x
   x = 4,554,475.77/2,810.50
6. Step 6: Final answer
   x = 1,620.52