Finding the Fourth Proportional to 3,988.71, 5,505.48 and 2,663.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,988.71 : 5,505.48 = 2,663.82 : x
2. Step 2: Convert to fraction form
   3,988.71/5,505.48 = 2,663.82/x
3. Step 3: Cross multiply
   3,988.71x = 5,505.48 × 2,663.82
4. Step 4: Simplify right side
   3,988.71x = 14,665,607.73
5. Step 5: Solve for x
   x = 14,665,607.73/3,988.71
6. Step 6: Final answer
   x = 3,676.78