Finding the Fourth Proportional to 21,399.57, 32,099.26 and 5,817.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,399.57 : 32,099.26 = 5,817.15 : x
2. Step 2: Convert to fraction form
   21,399.57/32,099.26 = 5,817.15/x
3. Step 3: Cross multiply
   21,399.57x = 32,099.26 × 5,817.15
4. Step 4: Simplify right side
   21,399.57x = 186,726,210.31
5. Step 5: Solve for x
   x = 186,726,210.31/21,399.57
6. Step 6: Final answer
   x = 8,725.70