Finding the Fourth Proportional to 10,911.66, 16,374.86 and 7,018.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,911.66 : 16,374.86 = 7,018.80 : x
2. Step 2: Convert to fraction form
   10,911.66/16,374.86 = 7,018.80/x
3. Step 3: Cross multiply
   10,911.66x = 16,374.86 × 7,018.80
4. Step 4: Simplify right side
   10,911.66x = 114,931,867.37
5. Step 5: Solve for x
   x = 114,931,867.37/10,911.66
6. Step 6: Final answer
   x = 10,532.94