Finding the Fourth Proportional to 10,285.85, 14,222.43 and 10,118.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,285.85 : 14,222.43 = 10,118.99 : x
2. Step 2: Convert to fraction form
   10,285.85/14,222.43 = 10,118.99/x
3. Step 3: Cross multiply
   10,285.85x = 14,222.43 × 10,118.99
4. Step 4: Simplify right side
   10,285.85x = 143,916,555.83
5. Step 5: Solve for x
   x = 143,916,555.83/10,285.85
6. Step 6: Final answer
   x = 13,991.71