Finding the Fourth Proportional to 10,685.88, 16,031.07 and 3,665.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,685.88 : 16,031.07 = 3,665.34 : x
2. Step 2: Convert to fraction form
   10,685.88/16,031.07 = 3,665.34/x
3. Step 3: Cross multiply
   10,685.88x = 16,031.07 × 3,665.34
4. Step 4: Simplify right side
   10,685.88x = 58,759,322.11
5. Step 5: Solve for x
   x = 58,759,322.11/10,685.88
6. Step 6: Final answer
   x = 5,498.78