Finding the Fourth Proportional to 1,908.01, 2,858.30 and 1,406.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,908.01 : 2,858.30 = 1,406.77 : x
2. Step 2: Convert to fraction form
   1,908.01/2,858.30 = 1,406.77/x
3. Step 3: Cross multiply
   1,908.01x = 2,858.30 × 1,406.77
4. Step 4: Simplify right side
   1,908.01x = 4,020,970.69
5. Step 5: Solve for x
   x = 4,020,970.69/1,908.01
6. Step 6: Final answer
   x = 2,107.42