Finding the Fourth Proportional to 11,875.50, 16,388.46 and 7,691.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,875.50 : 16,388.46 = 7,691.04 : x
2. Step 2: Convert to fraction form
   11,875.50/16,388.46 = 7,691.04/x
3. Step 3: Cross multiply
   11,875.50x = 16,388.46 × 7,691.04
4. Step 4: Simplify right side
   11,875.50x = 126,044,301.40
5. Step 5: Solve for x
   x = 126,044,301.40/11,875.50
6. Step 6: Final answer
   x = 10,613.81