Finding the Fourth Proportional to 15,611.57, 21,541.46 and 8,897.33

Step by Step Solution

1. Step 1: Write the proportion equation
   15,611.57 : 21,541.46 = 8,897.33 : x
2. Step 2: Convert to fraction form
   15,611.57/21,541.46 = 8,897.33/x
3. Step 3: Cross multiply
   15,611.57x = 21,541.46 × 8,897.33
4. Step 4: Simplify right side
   15,611.57x = 191,661,478.30
5. Step 5: Solve for x
   x = 191,661,478.30/15,611.57
6. Step 6: Final answer
   x = 12,276.89