Finding the Fourth Proportional to 21,978.04, 30,329.69 and 11,906.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978.04 : 30,329.69 = 11,906.52 : x
2. Step 2: Convert to fraction form
   21,978.04/30,329.69 = 11,906.52/x
3. Step 3: Cross multiply
   21,978.04x = 30,329.69 × 11,906.52
4. Step 4: Simplify right side
   21,978.04x = 361,121,060.58
5. Step 5: Solve for x
   x = 361,121,060.58/21,978.04
6. Step 6: Final answer
   x = 16,430.99