Finding the Fourth Proportional to 21,478.67, 32,198.55 and 7,624.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,478.67 : 32,198.55 = 7,624.43 : x
2. Step 2: Convert to fraction form
   21,478.67/32,198.55 = 7,624.43/x
3. Step 3: Cross multiply
   21,478.67x = 32,198.55 × 7,624.43
4. Step 4: Simplify right side
   21,478.67x = 245,495,429.58
5. Step 5: Solve for x
   x = 245,495,429.58/21,478.67
6. Step 6: Final answer
   x = 11,429.73