Finding the Fourth Proportional to 11,308.67, 15,587.97 and 8,914.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,308.67 : 15,587.97 = 8,914.76 : x
2. Step 2: Convert to fraction form
   11,308.67/15,587.97 = 8,914.76/x
3. Step 3: Cross multiply
   11,308.67x = 15,587.97 × 8,914.76
4. Step 4: Simplify right side
   11,308.67x = 138,962,933.50
5. Step 5: Solve for x
   x = 138,962,933.50/11,308.67
6. Step 6: Final answer
   x = 12,288.18