Finding the Fourth Proportional to 10,611.18, 15,916.59 and 3,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,611.18 : 15,916.59 = 3,685.50 : x
2. Step 2: Convert to fraction form
   10,611.18/15,916.59 = 3,685.50/x
3. Step 3: Cross multiply
   10,611.18x = 15,916.59 × 3,685.50
4. Step 4: Simplify right side
   10,611.18x = 58,660,592.45
5. Step 5: Solve for x
   x = 58,660,592.45/10,611.18
6. Step 6: Final answer
   x = 5,528.19