Finding the Fourth Proportional to 2,507.70, 3,765.83 and 2,090.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.70 : 3,765.83 = 2,090.81 : x
2. Step 2: Convert to fraction form
   2,507.70/3,765.83 = 2,090.81/x
3. Step 3: Cross multiply
   2,507.70x = 3,765.83 × 2,090.81
4. Step 4: Simplify right side
   2,507.70x = 7,873,635.02
5. Step 5: Solve for x
   x = 7,873,635.02/2,507.70
6. Step 6: Final answer
   x = 3,139.78