Finding the Fourth Proportional to 11,345.67, 16,993.89 and 5,490

Step by Step Solution

1. Step 1: Write the proportion equation
   11,345.67 : 16,993.89 = 5,490 : x
2. Step 2: Convert to fraction form
   11,345.67/16,993.89 = 5,490/x
3. Step 3: Cross multiply
   11,345.67x = 16,993.89 × 5,490
4. Step 4: Simplify right side
   11,345.67x = 93,296,456.10
5. Step 5: Solve for x
   x = 93,296,456.10/11,345.67
6. Step 6: Final answer
   x = 8,223.09