Finding the Fourth Proportional to 8,987.72, 12,376.29 and 8,788.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,987.72 : 12,376.29 = 8,788.58 : x
2. Step 2: Convert to fraction form
   8,987.72/12,376.29 = 8,788.58/x
3. Step 3: Cross multiply
   8,987.72x = 12,376.29 × 8,788.58
4. Step 4: Simplify right side
   8,987.72x = 108,769,952.89
5. Step 5: Solve for x
   x = 108,769,952.89/8,987.72
6. Step 6: Final answer
   x = 12,102.07