Finding the Fourth Proportional to 2,068.71, 2,855.18 and 1,405.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.71 : 2,855.18 = 1,405.11 : x
2. Step 2: Convert to fraction form
   2,068.71/2,855.18 = 1,405.11/x
3. Step 3: Cross multiply
   2,068.71x = 2,855.18 × 1,405.11
4. Step 4: Simplify right side
   2,068.71x = 4,011,834.94
5. Step 5: Solve for x
   x = 4,011,834.94/2,068.71
6. Step 6: Final answer
   x = 1,939.29