Finding the Fourth Proportional to 21,485.74, 32,210.28 and 8,151.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,485.74 : 32,210.28 = 8,151.27 : x
2. Step 2: Convert to fraction form
   21,485.74/32,210.28 = 8,151.27/x
3. Step 3: Cross multiply
   21,485.74x = 32,210.28 × 8,151.27
4. Step 4: Simplify right side
   21,485.74x = 262,554,816.10
5. Step 5: Solve for x
   x = 262,554,816.10/21,485.74
6. Step 6: Final answer
   x = 12,219.96