Finding the Fourth Proportional to 1,406.59, 1,949.29 and 1,386.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.59 : 1,949.29 = 1,386.77 : x
2. Step 2: Convert to fraction form
   1,406.59/1,949.29 = 1,386.77/x
3. Step 3: Cross multiply
   1,406.59x = 1,949.29 × 1,386.77
4. Step 4: Simplify right side
   1,406.59x = 2,703,222.45
5. Step 5: Solve for x
   x = 2,703,222.45/1,406.59
6. Step 6: Final answer
   x = 1,921.83