Finding the Fourth Proportional to 10,491.74, 14,478.15 and 5,711.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,491.74 : 14,478.15 = 5,711.69 : x
2. Step 2: Convert to fraction form
   10,491.74/14,478.15 = 5,711.69/x
3. Step 3: Cross multiply
   10,491.74x = 14,478.15 × 5,711.69
4. Step 4: Simplify right side
   10,491.74x = 82,694,762.19
5. Step 5: Solve for x
   x = 82,694,762.19/10,491.74
6. Step 6: Final answer
   x = 7,881.89