Finding the Fourth Proportional to 10,957.31, 16,436.87 and 3,561.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,957.31 : 16,436.87 = 3,561.60 : x
2. Step 2: Convert to fraction form
   10,957.31/16,436.87 = 3,561.60/x
3. Step 3: Cross multiply
   10,957.31x = 16,436.87 × 3,561.60
4. Step 4: Simplify right side
   10,957.31x = 58,541,538.38
5. Step 5: Solve for x
   x = 58,541,538.38/10,957.31
6. Step 6: Final answer
   x = 5,342.69