Finding the Fourth Proportional to 21,677.56, 32,520.74 and 12,322.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,677.56 : 32,520.74 = 12,322.06 : x
2. Step 2: Convert to fraction form
   21,677.56/32,520.74 = 12,322.06/x
3. Step 3: Cross multiply
   21,677.56x = 32,520.74 × 12,322.06
4. Step 4: Simplify right side
   21,677.56x = 400,722,509.52
5. Step 5: Solve for x
   x = 400,722,509.52/21,677.56
6. Step 6: Final answer
   x = 18,485.59