Finding the Fourth Proportional to 8,987.45, 12,401.33 and 5,158.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,987.45 : 12,401.33 = 5,158.53 : x
2. Step 2: Convert to fraction form
   8,987.45/12,401.33 = 5,158.53/x
3. Step 3: Cross multiply
   8,987.45x = 12,401.33 × 5,158.53
4. Step 4: Simplify right side
   8,987.45x = 63,972,607.05
5. Step 5: Solve for x
   x = 63,972,607.05/8,987.45
6. Step 6: Final answer
   x = 7,118.00