Finding the Fourth Proportional to 10,680.85, 16,031.06 and 5,419.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,680.85 : 16,031.06 = 5,419.59 : x
2. Step 2: Convert to fraction form
   10,680.85/16,031.06 = 5,419.59/x
3. Step 3: Cross multiply
   10,680.85x = 16,031.06 × 5,419.59
4. Step 4: Simplify right side
   10,680.85x = 86,881,665.21
5. Step 5: Solve for x
   x = 86,881,665.21/10,680.85
6. Step 6: Final answer
   x = 8,134.34