Finding the Fourth Proportional to 21,651, 32,308.95 and 19,318.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,651 : 32,308.95 = 19,318.20 : x
2. Step 2: Convert to fraction form
   21,651/32,308.95 = 19,318.20/x
3. Step 3: Cross multiply
   21,651x = 32,308.95 × 19,318.20
4. Step 4: Simplify right side
   21,651x = 624,150,757.89
5. Step 5: Solve for x
   x = 624,150,757.89/21,651
6. Step 6: Final answer
   x = 28,827.80