Finding the Fourth Proportional to 21,965.94, 30,307.77 and 12,406.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,965.94 : 30,307.77 = 12,406.02 : x
2. Step 2: Convert to fraction form
   21,965.94/30,307.77 = 12,406.02/x
3. Step 3: Cross multiply
   21,965.94x = 30,307.77 × 12,406.02
4. Step 4: Simplify right side
   21,965.94x = 375,998,800.78
5. Step 5: Solve for x
   x = 375,998,800.78/21,965.94
6. Step 6: Final answer
   x = 17,117.36