Finding the Fourth Proportional to 3,932.96, 5,905.72 and 2,290.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,932.96 : 5,905.72 = 2,290.69 : x
2. Step 2: Convert to fraction form
   3,932.96/5,905.72 = 2,290.69/x
3. Step 3: Cross multiply
   3,932.96x = 5,905.72 × 2,290.69
4. Step 4: Simplify right side
   3,932.96x = 13,528,144.22
5. Step 5: Solve for x
   x = 13,528,144.22/3,932.96
6. Step 6: Final answer
   x = 3,439.69