Finding the Fourth Proportional to 10,931.27, 16,397.01 and 3,140.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.27 : 16,397.01 = 3,140.09 : x
2. Step 2: Convert to fraction form
   10,931.27/16,397.01 = 3,140.09/x
3. Step 3: Cross multiply
   10,931.27x = 16,397.01 × 3,140.09
4. Step 4: Simplify right side
   10,931.27x = 51,488,005.15
5. Step 5: Solve for x
   x = 51,488,005.15/10,931.27
6. Step 6: Final answer
   x = 4,710.16