Finding the Fourth Proportional to 21,636.18, 32,457.60 and 9,156.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,636.18 : 32,457.60 = 9,156.27 : x
2. Step 2: Convert to fraction form
   21,636.18/32,457.60 = 9,156.27/x
3. Step 3: Cross multiply
   21,636.18x = 32,457.60 × 9,156.27
4. Step 4: Simplify right side
   21,636.18x = 297,190,549.15
5. Step 5: Solve for x
   x = 297,190,549.15/21,636.18
6. Step 6: Final answer
   x = 13,735.81