Finding the Fourth Proportional to 21,809, 30,094.02 and 12,377.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,809 : 30,094.02 = 12,377.64 : x
2. Step 2: Convert to fraction form
   21,809/30,094.02 = 12,377.64/x
3. Step 3: Cross multiply
   21,809x = 30,094.02 × 12,377.64
4. Step 4: Simplify right side
   21,809x = 372,492,945.71
5. Step 5: Solve for x
   x = 372,492,945.71/21,809
6. Step 6: Final answer
   x = 17,079.78