Finding the Fourth Proportional to 28,404.72, 42,620.40 and 14,563.44

Step by Step Solution

1. Step 1: Write the proportion equation
   28,404.72 : 42,620.40 = 14,563.44 : x
2. Step 2: Convert to fraction form
   28,404.72/42,620.40 = 14,563.44/x
3. Step 3: Cross multiply
   28,404.72x = 42,620.40 × 14,563.44
4. Step 4: Simplify right side
   28,404.72x = 620,699,638.18
5. Step 5: Solve for x
   x = 620,699,638.18/28,404.72
6. Step 6: Final answer
   x = 21,851.99