Finding the Fourth Proportional to 21,976.06, 30,319.32 and 12,414.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,976.06 : 30,319.32 = 12,414.74 : x
2. Step 2: Convert to fraction form
   21,976.06/30,319.32 = 12,414.74/x
3. Step 3: Cross multiply
   21,976.06x = 30,319.32 × 12,414.74
4. Step 4: Simplify right side
   21,976.06x = 376,406,474.78
5. Step 5: Solve for x
   x = 376,406,474.78/21,976.06
6. Step 6: Final answer
   x = 17,128.02