Finding the Fourth Proportional to 9,168, 12,619.71 and 7,987.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168 : 12,619.71 = 7,987.02 : x
2. Step 2: Convert to fraction form
   9,168/12,619.71 = 7,987.02/x
3. Step 3: Cross multiply
   9,168x = 12,619.71 × 7,987.02
4. Step 4: Simplify right side
   9,168x = 100,793,876.16
5. Step 5: Solve for x
   x = 100,793,876.16/9,168
6. Step 6: Final answer
   x = 10,994.10