Finding the Fourth Proportional to 10,491.90, 15,723.94 and 3,911.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,491.90 : 15,723.94 = 3,911.46 : x
2. Step 2: Convert to fraction form
   10,491.90/15,723.94 = 3,911.46/x
3. Step 3: Cross multiply
   10,491.90x = 15,723.94 × 3,911.46
4. Step 4: Simplify right side
   10,491.90x = 61,503,562.35
5. Step 5: Solve for x
   x = 61,503,562.35/10,491.90
6. Step 6: Final answer
   x = 5,862.00