Finding the Fourth Proportional to 8,986.47, 12,401.38 and 5,211.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,986.47 : 12,401.38 = 5,211.88 : x
2. Step 2: Convert to fraction form
   8,986.47/12,401.38 = 5,211.88/x
3. Step 3: Cross multiply
   8,986.47x = 12,401.38 × 5,211.88
4. Step 4: Simplify right side
   8,986.47x = 64,634,448.90
5. Step 5: Solve for x
   x = 64,634,448.90/8,986.47
6. Step 6: Final answer
   x = 7,192.42