Finding the Fourth Proportional to 21,726, 29,980.44 and 12,164.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,726 : 29,980.44 = 12,164.22 : x
2. Step 2: Convert to fraction form
   21,726/29,980.44 = 12,164.22/x
3. Step 3: Cross multiply
   21,726x = 29,980.44 × 12,164.22
4. Step 4: Simplify right side
   21,726x = 364,688,667.86
5. Step 5: Solve for x
   x = 364,688,667.86/21,726
6. Step 6: Final answer
   x = 16,785.82