Finding the Fourth Proportional to 21,700.86, 29,947.77 and 12,270.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,700.86 : 29,947.77 = 12,270.84 : x
2. Step 2: Convert to fraction form
   21,700.86/29,947.77 = 12,270.84/x
3. Step 3: Cross multiply
   21,700.86x = 29,947.77 × 12,270.84
4. Step 4: Simplify right side
   21,700.86x = 367,484,294.03
5. Step 5: Solve for x
   x = 367,484,294.03/21,700.86
6. Step 6: Final answer
   x = 16,934.09