Finding the Fourth Proportional to 11,039.94, 16,545.87 and 5,188.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,039.94 : 16,545.87 = 5,188.50 : x
2. Step 2: Convert to fraction form
   11,039.94/16,545.87 = 5,188.50/x
3. Step 3: Cross multiply
   11,039.94x = 16,545.87 × 5,188.50
4. Step 4: Simplify right side
   11,039.94x = 85,848,246.50
5. Step 5: Solve for x
   x = 85,848,246.50/11,039.94
6. Step 6: Final answer
   x = 7,776.15