Finding the Fourth Proportional to 16,686.05, 25,031.79 and 7,916.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,686.05 : 25,031.79 = 7,916.18 : x
2. Step 2: Convert to fraction form
   16,686.05/25,031.79 = 7,916.18/x
3. Step 3: Cross multiply
   16,686.05x = 25,031.79 × 7,916.18
4. Step 4: Simplify right side
   16,686.05x = 198,156,030.20
5. Step 5: Solve for x
   x = 198,156,030.20/16,686.05
6. Step 6: Final answer
   x = 11,875.55