Finding the Fourth Proportional to 21,941.87, 30,279.69 and 11,870.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,941.87 : 30,279.69 = 11,870.29 : x
2. Step 2: Convert to fraction form
   21,941.87/30,279.69 = 11,870.29/x
3. Step 3: Cross multiply
   21,941.87x = 30,279.69 × 11,870.29
4. Step 4: Simplify right side
   21,941.87x = 359,428,490.66
5. Step 5: Solve for x
   x = 359,428,490.66/21,941.87
6. Step 6: Final answer
   x = 16,380.94