Finding the Fourth Proportional to 10,611.09, 15,916.91 and 3,685.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,611.09 : 15,916.91 = 3,685.59 : x
2. Step 2: Convert to fraction form
   10,611.09/15,916.91 = 3,685.59/x
3. Step 3: Cross multiply
   10,611.09x = 15,916.91 × 3,685.59
4. Step 4: Simplify right side
   10,611.09x = 58,663,185.90
5. Step 5: Solve for x
   x = 58,663,185.90/10,611.09
6. Step 6: Final answer
   x = 5,528.48