Finding the Fourth Proportional to 8,985.22, 12,400.70 and 5,448.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,985.22 : 12,400.70 = 5,448.42 : x
2. Step 2: Convert to fraction form
   8,985.22/12,400.70 = 5,448.42/x
3. Step 3: Cross multiply
   8,985.22x = 12,400.70 × 5,448.42
4. Step 4: Simplify right side
   8,985.22x = 67,564,221.89
5. Step 5: Solve for x
   x = 67,564,221.89/8,985.22
6. Step 6: Final answer
   x = 7,519.48