Finding the Fourth Proportional to 2,111.55, 3,165.71 and 1,070.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.55 : 3,165.71 = 1,070.70 : x
2. Step 2: Convert to fraction form
   2,111.55/3,165.71 = 1,070.70/x
3. Step 3: Cross multiply
   2,111.55x = 3,165.71 × 1,070.70
4. Step 4: Simplify right side
   2,111.55x = 3,389,520.34
5. Step 5: Solve for x
   x = 3,389,520.34/2,111.55
6. Step 6: Final answer
   x = 1,605.23