Finding the Fourth Proportional to 13,363.73, 18,440.69 and 7,985.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,363.73 : 18,440.69 = 7,985.10 : x
2. Step 2: Convert to fraction form
   13,363.73/18,440.69 = 7,985.10/x
3. Step 3: Cross multiply
   13,363.73x = 18,440.69 × 7,985.10
4. Step 4: Simplify right side
   13,363.73x = 147,250,661.52
5. Step 5: Solve for x
   x = 147,250,661.52/13,363.73
6. Step 6: Final answer
   x = 11,018.68