Finding the Fourth Proportional to 16,688.35, 25,002.15 and 13,201.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,688.35 : 25,002.15 = 13,201.30 : x
2. Step 2: Convert to fraction form
   16,688.35/25,002.15 = 13,201.30/x
3. Step 3: Cross multiply
   16,688.35x = 25,002.15 × 13,201.30
4. Step 4: Simplify right side
   16,688.35x = 330,060,882.80
5. Step 5: Solve for x
   x = 330,060,882.80/16,688.35
6. Step 6: Final answer
   x = 19,777.92