Finding the Fourth Proportional to 11,185.71, 16,780.62 and 3,689.70

Step by Step Solution

1. Step 1: Write the proportion equation
   11,185.71 : 16,780.62 = 3,689.70 : x
2. Step 2: Convert to fraction form
   11,185.71/16,780.62 = 3,689.70/x
3. Step 3: Cross multiply
   11,185.71x = 16,780.62 × 3,689.70
4. Step 4: Simplify right side
   11,185.71x = 61,915,453.61
5. Step 5: Solve for x
   x = 61,915,453.61/11,185.71
6. Step 6: Final answer
   x = 5,535.23