Finding the Fourth Proportional to 2,239.56, 3,090.84 and 1,308

Step by Step Solution

1. Step 1: Write the proportion equation
   2,239.56 : 3,090.84 = 1,308 : x
2. Step 2: Convert to fraction form
   2,239.56/3,090.84 = 1,308/x
3. Step 3: Cross multiply
   2,239.56x = 3,090.84 × 1,308
4. Step 4: Simplify right side
   2,239.56x = 4,042,818.72
5. Step 5: Solve for x
   x = 4,042,818.72/2,239.56
6. Step 6: Final answer
   x = 1,805.18