Finding the Fourth Proportional to 10,686.42, 16,031.70 and 3,291.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,686.42 : 16,031.70 = 3,291.57 : x
2. Step 2: Convert to fraction form
   10,686.42/16,031.70 = 3,291.57/x
3. Step 3: Cross multiply
   10,686.42x = 16,031.70 × 3,291.57
4. Step 4: Simplify right side
   10,686.42x = 52,769,462.77
5. Step 5: Solve for x
   x = 52,769,462.77/10,686.42
6. Step 6: Final answer
   x = 4,937.99