Finding the Fourth Proportional to 11,243.49, 16,861.59 and 5,319.45

Step by Step Solution

1. Step 1: Write the proportion equation
   11,243.49 : 16,861.59 = 5,319.45 : x
2. Step 2: Convert to fraction form
   11,243.49/16,861.59 = 5,319.45/x
3. Step 3: Cross multiply
   11,243.49x = 16,861.59 × 5,319.45
4. Step 4: Simplify right side
   11,243.49x = 89,694,384.93
5. Step 5: Solve for x
   x = 89,694,384.93/11,243.49
6. Step 6: Final answer
   x = 7,977.45