Finding the Fourth Proportional to 2,705.82, 4,060.55 and 1,320.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,705.82 : 4,060.55 = 1,320.11 : x
2. Step 2: Convert to fraction form
   2,705.82/4,060.55 = 1,320.11/x
3. Step 3: Cross multiply
   2,705.82x = 4,060.55 × 1,320.11
4. Step 4: Simplify right side
   2,705.82x = 5,360,372.66
5. Step 5: Solve for x
   x = 5,360,372.66/2,705.82
6. Step 6: Final answer
   x = 1,981.05