Finding the Fourth Proportional to 3,799.71, 5,247.45 and 3,387.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,799.71 : 5,247.45 = 3,387.15 : x
2. Step 2: Convert to fraction form
   3,799.71/5,247.45 = 3,387.15/x
3. Step 3: Cross multiply
   3,799.71x = 5,247.45 × 3,387.15
4. Step 4: Simplify right side
   3,799.71x = 17,773,900.27
5. Step 5: Solve for x
   x = 17,773,900.27/3,799.71
6. Step 6: Final answer
   x = 4,677.70