Finding the Fourth Proportional to 8,989.86, 12,404.98 and 5,212.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,989.86 : 12,404.98 = 5,212.24 : x
2. Step 2: Convert to fraction form
   8,989.86/12,404.98 = 5,212.24/x
3. Step 3: Cross multiply
   8,989.86x = 12,404.98 × 5,212.24
4. Step 4: Simplify right side
   8,989.86x = 64,657,732.96
5. Step 5: Solve for x
   x = 64,657,732.96/8,989.86
6. Step 6: Final answer
   x = 7,192.30