Finding the Fourth Proportional to 2,109.90, 3,165.27 and 1,070.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.90 : 3,165.27 = 1,070.49 : x
2. Step 2: Convert to fraction form
   2,109.90/3,165.27 = 1,070.49/x
3. Step 3: Cross multiply
   2,109.90x = 3,165.27 × 1,070.49
4. Step 4: Simplify right side
   2,109.90x = 3,388,389.88
5. Step 5: Solve for x
   x = 3,388,389.88/2,109.90
6. Step 6: Final answer
   x = 1,605.95