Finding the Fourth Proportional to 21,776.16, 30,050.82 and 12,824.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,776.16 : 30,050.82 = 12,824.04 : x
2. Step 2: Convert to fraction form
   21,776.16/30,050.82 = 12,824.04/x
3. Step 3: Cross multiply
   21,776.16x = 30,050.82 × 12,824.04
4. Step 4: Simplify right side
   21,776.16x = 385,372,917.71
5. Step 5: Solve for x
   x = 385,372,917.71/21,776.16
6. Step 6: Final answer
   x = 17,697.01