Finding the Fourth Proportional to 15,989.82, 22,065.15 and 8,820.99

Step by Step Solution

1. Step 1: Write the proportion equation
   15,989.82 : 22,065.15 = 8,820.99 : x
2. Step 2: Convert to fraction form
   15,989.82/22,065.15 = 8,820.99/x
3. Step 3: Cross multiply
   15,989.82x = 22,065.15 × 8,820.99
4. Step 4: Simplify right side
   15,989.82x = 194,636,467.50
5. Step 5: Solve for x
   x = 194,636,467.50/15,989.82
6. Step 6: Final answer
   x = 12,172.52