Finding the Fourth Proportional to 2,293.50, 3,439.89 and 1,905.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,293.50 : 3,439.89 = 1,905.99 : x
2. Step 2: Convert to fraction form
   2,293.50/3,439.89 = 1,905.99/x
3. Step 3: Cross multiply
   2,293.50x = 3,439.89 × 1,905.99
4. Step 4: Simplify right side
   2,293.50x = 6,556,412.59
5. Step 5: Solve for x
   x = 6,556,412.59/2,293.50
6. Step 6: Final answer
   x = 2,858.69