Finding the Fourth Proportional to 2,648.10, 3,973.50 and 1,089.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.10 : 3,973.50 = 1,089.30 : x
2. Step 2: Convert to fraction form
   2,648.10/3,973.50 = 1,089.30/x
3. Step 3: Cross multiply
   2,648.10x = 3,973.50 × 1,089.30
4. Step 4: Simplify right side
   2,648.10x = 4,328,333.55
5. Step 5: Solve for x
   x = 4,328,333.55/2,648.10
6. Step 6: Final answer
   x = 1,634.51