Finding the Fourth Proportional to 3,421.05, 5,131.88 and 2,507.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,421.05 : 5,131.88 = 2,507.97 : x
2. Step 2: Convert to fraction form
   3,421.05/5,131.88 = 2,507.97/x
3. Step 3: Cross multiply
   3,421.05x = 5,131.88 × 2,507.97
4. Step 4: Simplify right side
   3,421.05x = 12,870,588.54
5. Step 5: Solve for x
   x = 12,870,588.54/3,421.05
6. Step 6: Final answer
   x = 3,762.17