Finding the Fourth Proportional to 8,987.44, 12,401.72 and 5,007.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,987.44 : 12,401.72 = 5,007.80 : x
2. Step 2: Convert to fraction form
   8,987.44/12,401.72 = 5,007.80/x
3. Step 3: Cross multiply
   8,987.44x = 12,401.72 × 5,007.80
4. Step 4: Simplify right side
   8,987.44x = 62,105,333.42
5. Step 5: Solve for x
   x = 62,105,333.42/8,987.44
6. Step 6: Final answer
   x = 6,910.24