Finding the Fourth Proportional to 9,168.50, 12,620.40 and 7,987.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.50 : 12,620.40 = 7,987.52 : x
2. Step 2: Convert to fraction form
   9,168.50/12,620.40 = 7,987.52/x
3. Step 3: Cross multiply
   9,168.50x = 12,620.40 × 7,987.52
4. Step 4: Simplify right side
   9,168.50x = 100,805,697.41
5. Step 5: Solve for x
   x = 100,805,697.41/9,168.50
6. Step 6: Final answer
   x = 10,994.79