Finding the Fourth Proportional to 16,685.67, 25,031.27 and 7,915.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,685.67 : 25,031.27 = 7,915.80 : x
2. Step 2: Convert to fraction form
   16,685.67/25,031.27 = 7,915.80/x
3. Step 3: Cross multiply
   16,685.67x = 25,031.27 × 7,915.80
4. Step 4: Simplify right side
   16,685.67x = 198,142,546.86
5. Step 5: Solve for x
   x = 198,142,546.86/16,685.67
6. Step 6: Final answer
   x = 11,875.01