Finding the Fourth Proportional to 3,980.39, 5,493.05 and 2,387.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.39 : 5,493.05 = 2,387.30 : x
2. Step 2: Convert to fraction form
   3,980.39/5,493.05 = 2,387.30/x
3. Step 3: Cross multiply
   3,980.39x = 5,493.05 × 2,387.30
4. Step 4: Simplify right side
   3,980.39x = 13,113,527.82
5. Step 5: Solve for x
   x = 13,113,527.82/3,980.39
6. Step 6: Final answer
   x = 3,294.53